Home / 101,629.26-140,157-65,781.90

Finding the Fourth Proportional to 101,629.26, 140,157 and 65,781.90

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Solution

The fourth proportional to 101,629.26, 140,157 and 65,781.90 is: 90,719.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,629.26 : 140,157 = 65,781.90 : x
  2. Step 2: Convert to fraction form
    101,629.26/140,157 = 65,781.90/x
  3. Step 3: Cross multiply
    101,629.26x = 140,157 × 65,781.90
  4. Step 4: Simplify right side
    101,629.26x = 9,219,793,758.30
  5. Step 5: Solve for x
    x = 9,219,793,758.30/101,629.26
  6. Step 6: Final answer
    x = 90,719.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.