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Finding the Fourth Proportional to 138,080.61, 207,123.48 and 43,308.69

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Solution

The fourth proportional to 138,080.61, 207,123.48 and 43,308.69 is: 64,963.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,080.61 : 207,123.48 = 43,308.69 : x
  2. Step 2: Convert to fraction form
    138,080.61/207,123.48 = 43,308.69/x
  3. Step 3: Cross multiply
    138,080.61x = 207,123.48 × 43,308.69
  4. Step 4: Simplify right side
    138,080.61x = 8,970,246,587.04
  5. Step 5: Solve for x
    x = 8,970,246,587.04/138,080.61
  6. Step 6: Final answer
    x = 64,963.84

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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.