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Finding the Fourth Proportional to 198,104,652.40, 297,156,978.60 and 61,789,817.20

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Solution

The fourth proportional to 198,104,652.40, 297,156,978.60 and 61,789,817.20 is: 92,684,725.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,104,652.40 : 297,156,978.60 = 61,789,817.20 : x
  2. Step 2: Convert to fraction form
    198,104,652.40/297,156,978.60 = 61,789,817.20/x
  3. Step 3: Cross multiply
    198,104,652.40x = 297,156,978.60 × 61,789,817.20
  4. Step 4: Simplify right side
    198,104,652.40x = 18,361,275,387,398,316
  5. Step 5: Solve for x
    x = 18,361,275,387,398,316/198,104,652.40
  6. Step 6: Final answer
    x = 92,684,725.80

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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.