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Finding the Fourth Proportional to 78,691,807.80, 118,037,711.70 and 62,252,566.20

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Solution

The fourth proportional to 78,691,807.80, 118,037,711.70 and 62,252,566.20 is: 93,378,849.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,691,807.80 : 118,037,711.70 = 62,252,566.20 : x
  2. Step 2: Convert to fraction form
    78,691,807.80/118,037,711.70 = 62,252,566.20/x
  3. Step 3: Cross multiply
    78,691,807.80x = 118,037,711.70 × 62,252,566.20
  4. Step 4: Simplify right side
    78,691,807.80x = 7,348,150,461,700,765
  5. Step 5: Solve for x
    x = 7,348,150,461,700,765/78,691,807.80
  6. Step 6: Final answer
    x = 93,378,849.30

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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.