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Finding the Fourth Proportional to 138,585.60, 207,975.60 and 88,786.80

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Solution

The fourth proportional to 138,585.60, 207,975.60 and 88,786.80 is: 133,242.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,585.60 : 207,975.60 = 88,786.80 : x
  2. Step 2: Convert to fraction form
    138,585.60/207,975.60 = 88,786.80/x
  3. Step 3: Cross multiply
    138,585.60x = 207,975.60 × 88,786.80
  4. Step 4: Simplify right side
    138,585.60x = 18,465,488,002.08
  5. Step 5: Solve for x
    x = 18,465,488,002.08/138,585.60
  6. Step 6: Final answer
    x = 133,242.47

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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.