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Finding the Fourth Proportional to 66,472.38, 99,724.95 and 19,725.21

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Solution

The fourth proportional to 66,472.38, 99,724.95 and 19,725.21 is: 29,592.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,472.38 : 99,724.95 = 19,725.21 : x
  2. Step 2: Convert to fraction form
    66,472.38/99,724.95 = 19,725.21/x
  3. Step 3: Cross multiply
    66,472.38x = 99,724.95 × 19,725.21
  4. Step 4: Simplify right side
    66,472.38x = 1,967,095,580.99
  5. Step 5: Solve for x
    x = 1,967,095,580.99/66,472.38
  6. Step 6: Final answer
    x = 29,592.68

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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.