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Finding the Fourth Proportional to 437,612.81, 656,418.99 and 138,123.41

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Solution

The fourth proportional to 437,612.81, 656,418.99 and 138,123.41 is: 207,185.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    437,612.81 : 656,418.99 = 138,123.41 : x
  2. Step 2: Convert to fraction form
    437,612.81/656,418.99 = 138,123.41/x
  3. Step 3: Cross multiply
    437,612.81x = 656,418.99 × 138,123.41
  4. Step 4: Simplify right side
    437,612.81x = 90,666,829,287.56
  5. Step 5: Solve for x
    x = 90,666,829,287.56/437,612.81
  6. Step 6: Final answer
    x = 207,185.04

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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.