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Finding the Fourth Proportional to 71,572.20, 107,139.60 and 55,825.80

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Solution

The fourth proportional to 71,572.20, 107,139.60 and 55,825.80 is: 83,568.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,572.20 : 107,139.60 = 55,825.80 : x
  2. Step 2: Convert to fraction form
    71,572.20/107,139.60 = 55,825.80/x
  3. Step 3: Cross multiply
    71,572.20x = 107,139.60 × 55,825.80
  4. Step 4: Simplify right side
    71,572.20x = 5,981,153,881.68
  5. Step 5: Solve for x
    x = 5,981,153,881.68/71,572.20
  6. Step 6: Final answer
    x = 83,568.12

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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.