Home / 99,981.30-137,972.63-54,658.24

Finding the Fourth Proportional to 99,981.30, 137,972.63 and 54,658.24

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Solution

The fourth proportional to 99,981.30, 137,972.63 and 54,658.24 is: 75,427.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,981.30 : 137,972.63 = 54,658.24 : x
  2. Step 2: Convert to fraction form
    99,981.30/137,972.63 = 54,658.24/x
  3. Step 3: Cross multiply
    99,981.30x = 137,972.63 × 54,658.24
  4. Step 4: Simplify right side
    99,981.30x = 7,541,341,691.78
  5. Step 5: Solve for x
    x = 7,541,341,691.78/99,981.30
  6. Step 6: Final answer
    x = 75,427.52

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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.