Home / 99,428.48-137,213.12-54,715.52

Finding the Fourth Proportional to 99,428.48, 137,213.12 and 54,715.52

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Solution

The fourth proportional to 99,428.48, 137,213.12 and 54,715.52 is: 75,508.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,428.48 : 137,213.12 = 54,715.52 : x
  2. Step 2: Convert to fraction form
    99,428.48/137,213.12 = 54,715.52/x
  3. Step 3: Cross multiply
    99,428.48x = 137,213.12 × 54,715.52
  4. Step 4: Simplify right side
    99,428.48x = 7,507,687,211.62
  5. Step 5: Solve for x
    x = 7,507,687,211.62/99,428.48
  6. Step 6: Final answer
    x = 75,508.42

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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.