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Finding the Fourth Proportional to 139,630.52, 207,866.41 and 138,800.12

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Solution

The fourth proportional to 139,630.52, 207,866.41 and 138,800.12 is: 206,630.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,630.52 : 207,866.41 = 138,800.12 : x
  2. Step 2: Convert to fraction form
    139,630.52/207,866.41 = 138,800.12/x
  3. Step 3: Cross multiply
    139,630.52x = 207,866.41 × 138,800.12
  4. Step 4: Simplify right side
    139,630.52x = 28,851,882,651.97
  5. Step 5: Solve for x
    x = 28,851,882,651.97/139,630.52
  6. Step 6: Final answer
    x = 206,630.20

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.