Home / 90,781.40-136,107.30-40,820.60

Finding the Fourth Proportional to 90,781.40, 136,107.30 and 40,820.60

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Solution

The fourth proportional to 90,781.40, 136,107.30 and 40,820.60 is: 61,201.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,781.40 : 136,107.30 = 40,820.60 : x
  2. Step 2: Convert to fraction form
    90,781.40/136,107.30 = 40,820.60/x
  3. Step 3: Cross multiply
    90,781.40x = 136,107.30 × 40,820.60
  4. Step 4: Simplify right side
    90,781.40x = 5,555,981,650.38
  5. Step 5: Solve for x
    x = 5,555,981,650.38/90,781.40
  6. Step 6: Final answer
    x = 61,201.76

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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.