Home / 81,649,905.60-122,474,858.40-78,878,539.20

Finding the Fourth Proportional to 81,649,905.60, 122,474,858.40 and 78,878,539.20

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Solution

The fourth proportional to 81,649,905.60, 122,474,858.40 and 78,878,539.20 is: 118,317,808.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,649,905.60 : 122,474,858.40 = 78,878,539.20 : x
  2. Step 2: Convert to fraction form
    81,649,905.60/122,474,858.40 = 78,878,539.20/x
  3. Step 3: Cross multiply
    81,649,905.60x = 122,474,858.40 × 78,878,539.20
  4. Step 4: Simplify right side
    81,649,905.60x = 9,660,637,919,318,850
  5. Step 5: Solve for x
    x = 9,660,637,919,318,850/81,649,905.60
  6. Step 6: Final answer
    x = 118,317,808.80

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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.