Home / 100,321.26-138,440.52-54,996.90

Finding the Fourth Proportional to 100,321.26, 138,440.52 and 54,996.90

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Solution

The fourth proportional to 100,321.26, 138,440.52 and 54,996.90 is: 75,894.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,321.26 : 138,440.52 = 54,996.90 : x
  2. Step 2: Convert to fraction form
    100,321.26/138,440.52 = 54,996.90/x
  3. Step 3: Cross multiply
    100,321.26x = 138,440.52 × 54,996.90
  4. Step 4: Simplify right side
    100,321.26x = 7,613,799,434.39
  5. Step 5: Solve for x
    x = 7,613,799,434.39/100,321.26
  6. Step 6: Final answer
    x = 75,894.18

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1.5x scale

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.