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Finding the Fourth Proportional to 81,279.56, 112,163.22 and 45,470.20

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Solution

The fourth proportional to 81,279.56, 112,163.22 and 45,470.20 is: 62,747.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,279.56 : 112,163.22 = 45,470.20 : x
  2. Step 2: Convert to fraction form
    81,279.56/112,163.22 = 45,470.20/x
  3. Step 3: Cross multiply
    81,279.56x = 112,163.22 × 45,470.20
  4. Step 4: Simplify right side
    81,279.56x = 5,100,084,046.04
  5. Step 5: Solve for x
    x = 5,100,084,046.04/81,279.56
  6. Step 6: Final answer
    x = 62,747.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.