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Finding the Fourth Proportional to 90,251.60, 135,400.76 and 52,843.28

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Solution

The fourth proportional to 90,251.60, 135,400.76 and 52,843.28 is: 79,278.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,251.60 : 135,400.76 = 52,843.28 : x
  2. Step 2: Convert to fraction form
    90,251.60/135,400.76 = 52,843.28/x
  3. Step 3: Cross multiply
    90,251.60x = 135,400.76 × 52,843.28
  4. Step 4: Simplify right side
    90,251.60x = 7,155,020,272.89
  5. Step 5: Solve for x
    x = 7,155,020,272.89/90,251.60
  6. Step 6: Final answer
    x = 79,278.60

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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.