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Finding the Fourth Proportional to 138,939.52, 191,737.56 and 75,277.72

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Solution

The fourth proportional to 138,939.52, 191,737.56 and 75,277.72 is: 103,883.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,939.52 : 191,737.56 = 75,277.72 : x
  2. Step 2: Convert to fraction form
    138,939.52/191,737.56 = 75,277.72/x
  3. Step 3: Cross multiply
    138,939.52x = 191,737.56 × 75,277.72
  4. Step 4: Simplify right side
    138,939.52x = 14,433,566,355.16
  5. Step 5: Solve for x
    x = 14,433,566,355.16/138,939.52
  6. Step 6: Final answer
    x = 103,883.81

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1.5x scale

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.