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Finding the Fourth Proportional to 138,513.47, 207,696.36 and 71,886.52

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Solution

The fourth proportional to 138,513.47, 207,696.36 and 71,886.52 is: 107,791.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,513.47 : 207,696.36 = 71,886.52 : x
  2. Step 2: Convert to fraction form
    138,513.47/207,696.36 = 71,886.52/x
  3. Step 3: Cross multiply
    138,513.47x = 207,696.36 × 71,886.52
  4. Step 4: Simplify right side
    138,513.47x = 14,930,567,498.59
  5. Step 5: Solve for x
    x = 14,930,567,498.59/138,513.47
  6. Step 6: Final answer
    x = 107,791.45

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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.