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Finding the Fourth Proportional to 138,340.15, 207,696.80 and 88,517.50

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Solution

The fourth proportional to 138,340.15, 207,696.80 and 88,517.50 is: 132,895.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,340.15 : 207,696.80 = 88,517.50 : x
  2. Step 2: Convert to fraction form
    138,340.15/207,696.80 = 88,517.50/x
  3. Step 3: Cross multiply
    138,340.15x = 207,696.80 × 88,517.50
  4. Step 4: Simplify right side
    138,340.15x = 18,384,801,494
  5. Step 5: Solve for x
    x = 18,384,801,494/138,340.15
  6. Step 6: Final answer
    x = 132,895.63

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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.