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Finding the Fourth Proportional to 138,399.60, 207,696.60 and 88,600.80

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Solution

The fourth proportional to 138,399.60, 207,696.60 and 88,600.80 is: 132,963.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,399.60 : 207,696.60 = 88,600.80 : x
  2. Step 2: Convert to fraction form
    138,399.60/207,696.60 = 88,600.80/x
  3. Step 3: Cross multiply
    138,399.60x = 207,696.60 × 88,600.80
  4. Step 4: Simplify right side
    138,399.60x = 18,402,084,917.28
  5. Step 5: Solve for x
    x = 18,402,084,917.28/138,399.60
  6. Step 6: Final answer
    x = 132,963.43

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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.