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Finding the Fourth Proportional to 124,691.60, 172,031.72 and 70,963.16

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Solution

The fourth proportional to 124,691.60, 172,031.72 and 70,963.16 is: 97,904.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,691.60 : 172,031.72 = 70,963.16 : x
  2. Step 2: Convert to fraction form
    124,691.60/172,031.72 = 70,963.16/x
  3. Step 3: Cross multiply
    124,691.60x = 172,031.72 × 70,963.16
  4. Step 4: Simplify right side
    124,691.60x = 12,207,914,471.44
  5. Step 5: Solve for x
    x = 12,207,914,471.44/124,691.60
  6. Step 6: Final answer
    x = 97,904.87

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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.