Home / 81,046,656,010.60-121,569,984,015.90-67,985,961,994.60

Finding the Fourth Proportional to 81,046,656,010.60, 121,569,984,015.90 and 67,985,961,994.60

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Solution

The fourth proportional to 81,046,656,010.60, 121,569,984,015.90 and 67,985,961,994.60 is: 101,978,942,991.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,046,656,010.60 : 121,569,984,015.90 = 67,985,961,994.60 : x
  2. Step 2: Convert to fraction form
    81,046,656,010.60/121,569,984,015.90 = 67,985,961,994.60/x
  3. Step 3: Cross multiply
    81,046,656,010.60x = 121,569,984,015.90 × 67,985,961,994.60
  4. Step 4: Simplify right side
    81,046,656,010.60x = 8,265,052,312,989,105,913,856
  5. Step 5: Solve for x
    x = 8,265,052,312,989,105,913,856/81,046,656,010.60
  6. Step 6: Final answer
    x = 101,978,942,991.90

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Double scale
Find fourth proportional to 81,046,656,011.60, 121,569,984,017.40 and 67,985,961,995.60
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.