Home / 99,619.20-137,472-54,906.24

Finding the Fourth Proportional to 99,619.20, 137,472 and 54,906.24

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Solution

The fourth proportional to 99,619.20, 137,472 and 54,906.24 is: 75,769.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,619.20 : 137,472 = 54,906.24 : x
  2. Step 2: Convert to fraction form
    99,619.20/137,472 = 54,906.24/x
  3. Step 3: Cross multiply
    99,619.20x = 137,472 × 54,906.24
  4. Step 4: Simplify right side
    99,619.20x = 7,548,070,625.28
  5. Step 5: Solve for x
    x = 7,548,070,625.28/99,619.20
  6. Step 6: Final answer
    x = 75,769.24

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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.