Home / 72,419,471.71-99,940,765.05-39,381,653.09

Finding the Fourth Proportional to 72,419,471.71, 99,940,765.05 and 39,381,653.09

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Solution

The fourth proportional to 72,419,471.71, 99,940,765.05 and 39,381,653.09 is: 54,347,711.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,419,471.71 : 99,940,765.05 = 39,381,653.09 : x
  2. Step 2: Convert to fraction form
    72,419,471.71/99,940,765.05 = 39,381,653.09/x
  3. Step 3: Cross multiply
    72,419,471.71x = 99,940,765.05 × 39,381,653.09
  4. Step 4: Simplify right side
    72,419,471.71x = 3,935,832,538,350,599.50
  5. Step 5: Solve for x
    x = 3,935,832,538,350,599.50/72,419,471.71
  6. Step 6: Final answer
    x = 54,347,711.26

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.