Home / 90,857.20-136,026.60-80,489.20

Finding the Fourth Proportional to 90,857.20, 136,026.60 and 80,489.20

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Solution

The fourth proportional to 90,857.20, 136,026.60 and 80,489.20 is: 120,504.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,857.20 : 136,026.60 = 80,489.20 : x
  2. Step 2: Convert to fraction form
    90,857.20/136,026.60 = 80,489.20/x
  3. Step 3: Cross multiply
    90,857.20x = 136,026.60 × 80,489.20
  4. Step 4: Simplify right side
    90,857.20x = 10,948,672,212.72
  5. Step 5: Solve for x
    x = 10,948,672,212.72/90,857.20
  6. Step 6: Final answer
    x = 120,504.18

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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.