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Finding the Fourth Proportional to 91,806,943.20, 137,710,414.80 and 71,001,028.05

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Solution

The fourth proportional to 91,806,943.20, 137,710,414.80 and 71,001,028.05 is: 106,501,542.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,806,943.20 : 137,710,414.80 = 71,001,028.05 : x
  2. Step 2: Convert to fraction form
    91,806,943.20/137,710,414.80 = 71,001,028.05/x
  3. Step 3: Cross multiply
    91,806,943.20x = 137,710,414.80 × 71,001,028.05
  4. Step 4: Simplify right side
    91,806,943.20x = 9,777,581,023,991,936
  5. Step 5: Solve for x
    x = 9,777,581,023,991,936/91,806,943.20
  6. Step 6: Final answer
    x = 106,501,542.08

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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.