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Finding the Fourth Proportional to 138,339.53, 207,695.86 and 88,516.88

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Solution

The fourth proportional to 138,339.53, 207,695.86 and 88,516.88 is: 132,894.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,339.53 : 207,695.86 = 88,516.88 : x
  2. Step 2: Convert to fraction form
    138,339.53/207,695.86 = 88,516.88/x
  3. Step 3: Cross multiply
    138,339.53x = 207,695.86 × 88,516.88
  4. Step 4: Simplify right side
    138,339.53x = 18,384,588,256.35
  5. Step 5: Solve for x
    x = 18,384,588,256.35/138,339.53
  6. Step 6: Final answer
    x = 132,894.69

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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.