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Finding the Fourth Proportional to 138,590.80, 207,937.40 and 133,470.80

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Solution

The fourth proportional to 138,590.80, 207,937.40 and 133,470.80 is: 200,255.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,590.80 : 207,937.40 = 133,470.80 : x
  2. Step 2: Convert to fraction form
    138,590.80/207,937.40 = 133,470.80/x
  3. Step 3: Cross multiply
    138,590.80x = 207,937.40 × 133,470.80
  4. Step 4: Simplify right side
    138,590.80x = 27,753,571,127.92
  5. Step 5: Solve for x
    x = 27,753,571,127.92/138,590.80
  6. Step 6: Final answer
    x = 200,255.51

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1.5x scale

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.