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Finding the Fourth Proportional to 138,377.76, 207,543.96 and 38,544.72

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Solution

The fourth proportional to 138,377.76, 207,543.96 and 38,544.72 is: 57,810.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,377.76 : 207,543.96 = 38,544.72 : x
  2. Step 2: Convert to fraction form
    138,377.76/207,543.96 = 38,544.72/x
  3. Step 3: Cross multiply
    138,377.76x = 207,543.96 × 38,544.72
  4. Step 4: Simplify right side
    138,377.76x = 7,999,723,825.89
  5. Step 5: Solve for x
    x = 7,999,723,825.89/138,377.76
  6. Step 6: Final answer
    x = 57,810.76

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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.