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Finding the Fourth Proportional to 100,591.47, 138,819.22 and 55,272.27

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Solution

The fourth proportional to 100,591.47, 138,819.22 and 55,272.27 is: 76,277.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,591.47 : 138,819.22 = 55,272.27 : x
  2. Step 2: Convert to fraction form
    100,591.47/138,819.22 = 55,272.27/x
  3. Step 3: Cross multiply
    100,591.47x = 138,819.22 × 55,272.27
  4. Step 4: Simplify right side
    100,591.47x = 7,672,853,791.42
  5. Step 5: Solve for x
    x = 7,672,853,791.42/100,591.47
  6. Step 6: Final answer
    x = 76,277.38

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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.