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Finding the Fourth Proportional to 90,873.38, 136,332.14 and 28,543.88

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Solution

The fourth proportional to 90,873.38, 136,332.14 and 28,543.88 is: 42,822.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,873.38 : 136,332.14 = 28,543.88 : x
  2. Step 2: Convert to fraction form
    90,873.38/136,332.14 = 28,543.88/x
  3. Step 3: Cross multiply
    90,873.38x = 136,332.14 × 28,543.88
  4. Step 4: Simplify right side
    90,873.38x = 3,891,447,419.92
  5. Step 5: Solve for x
    x = 3,891,447,419.92/90,873.38
  6. Step 6: Final answer
    x = 42,822.75

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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.