Home / 90,743.20-136,082.40-31,580.80

Finding the Fourth Proportional to 90,743.20, 136,082.40 and 31,580.80

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Solution

The fourth proportional to 90,743.20, 136,082.40 and 31,580.80 is: 47,359.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,743.20 : 136,082.40 = 31,580.80 : x
  2. Step 2: Convert to fraction form
    90,743.20/136,082.40 = 31,580.80/x
  3. Step 3: Cross multiply
    90,743.20x = 136,082.40 × 31,580.80
  4. Step 4: Simplify right side
    90,743.20x = 4,297,591,057.92
  5. Step 5: Solve for x
    x = 4,297,591,057.92/90,743.20
  6. Step 6: Final answer
    x = 47,359.92

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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.