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Finding the Fourth Proportional to 90,862.20, 136,034.10 and 80,494.20

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Solution

The fourth proportional to 90,862.20, 136,034.10 and 80,494.20 is: 120,511.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,862.20 : 136,034.10 = 80,494.20 : x
  2. Step 2: Convert to fraction form
    90,862.20/136,034.10 = 80,494.20/x
  3. Step 3: Cross multiply
    90,862.20x = 136,034.10 × 80,494.20
  4. Step 4: Simplify right side
    90,862.20x = 10,949,956,052.22
  5. Step 5: Solve for x
    x = 10,949,956,052.22/90,862.20
  6. Step 6: Final answer
    x = 120,511.68

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1.5x scale

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.