Home / 90,948.20-136,446.60-81,155.30

Finding the Fourth Proportional to 90,948.20, 136,446.60 and 81,155.30

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Solution

The fourth proportional to 90,948.20, 136,446.60 and 81,155.30 is: 121,754.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,948.20 : 136,446.60 = 81,155.30 : x
  2. Step 2: Convert to fraction form
    90,948.20/136,446.60 = 81,155.30/x
  3. Step 3: Cross multiply
    90,948.20x = 136,446.60 × 81,155.30
  4. Step 4: Simplify right side
    90,948.20x = 11,073,364,756.98
  5. Step 5: Solve for x
    x = 11,073,364,756.98/90,948.20
  6. Step 6: Final answer
    x = 121,754.63

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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.