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Finding the Fourth Proportional to 71,974.84, 99,324.80 and 39,711.12

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Solution

The fourth proportional to 71,974.84, 99,324.80 and 39,711.12 is: 54,801.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,974.84 : 99,324.80 = 39,711.12 : x
  2. Step 2: Convert to fraction form
    71,974.84/99,324.80 = 39,711.12/x
  3. Step 3: Cross multiply
    71,974.84x = 99,324.80 × 39,711.12
  4. Step 4: Simplify right side
    71,974.84x = 3,944,299,051.78
  5. Step 5: Solve for x
    x = 3,944,299,051.78/71,974.84
  6. Step 6: Final answer
    x = 54,801.08

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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.