Home / 138,931.98-191,727.07-75,269.78

Finding the Fourth Proportional to 138,931.98, 191,727.07 and 75,269.78

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Solution

The fourth proportional to 138,931.98, 191,727.07 and 75,269.78 is: 103,872.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,931.98 : 191,727.07 = 75,269.78 : x
  2. Step 2: Convert to fraction form
    138,931.98/191,727.07 = 75,269.78/x
  3. Step 3: Cross multiply
    138,931.98x = 191,727.07 × 75,269.78
  4. Step 4: Simplify right side
    138,931.98x = 14,431,253,951.11
  5. Step 5: Solve for x
    x = 14,431,253,951.11/138,931.98
  6. Step 6: Final answer
    x = 103,872.80

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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.