Home / 81,649,903.60-122,474,855.40-78,878,537.20

Finding the Fourth Proportional to 81,649,903.60, 122,474,855.40 and 78,878,537.20

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Solution

The fourth proportional to 81,649,903.60, 122,474,855.40 and 78,878,537.20 is: 118,317,805.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,649,903.60 : 122,474,855.40 = 78,878,537.20 : x
  2. Step 2: Convert to fraction form
    81,649,903.60/122,474,855.40 = 78,878,537.20/x
  3. Step 3: Cross multiply
    81,649,903.60x = 122,474,855.40 × 78,878,537.20
  4. Step 4: Simplify right side
    81,649,903.60x = 9,660,637,437,733,522
  5. Step 5: Solve for x
    x = 9,660,637,437,733,522/81,649,903.60
  6. Step 6: Final answer
    x = 118,317,805.80

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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.