Home / 100,517.29-138,707.56-55,194.96

Finding the Fourth Proportional to 100,517.29, 138,707.56 and 55,194.96

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Solution

The fourth proportional to 100,517.29, 138,707.56 and 55,194.96 is: 76,165.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,517.29 : 138,707.56 = 55,194.96 : x
  2. Step 2: Convert to fraction form
    100,517.29/138,707.56 = 55,194.96/x
  3. Step 3: Cross multiply
    100,517.29x = 138,707.56 × 55,194.96
  4. Step 4: Simplify right side
    100,517.29x = 7,655,958,225.90
  5. Step 5: Solve for x
    x = 7,655,958,225.90/100,517.29
  6. Step 6: Final answer
    x = 76,165.59

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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.