Home / 99,972.68-137,962.56-54,651.20

Finding the Fourth Proportional to 99,972.68, 137,962.56 and 54,651.20

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Solution

The fourth proportional to 99,972.68, 137,962.56 and 54,651.20 is: 75,418.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,972.68 : 137,962.56 = 54,651.20 : x
  2. Step 2: Convert to fraction form
    99,972.68/137,962.56 = 54,651.20/x
  3. Step 3: Cross multiply
    99,972.68x = 137,962.56 × 54,651.20
  4. Step 4: Simplify right side
    99,972.68x = 7,539,818,974.20
  5. Step 5: Solve for x
    x = 7,539,818,974.20/99,972.68
  6. Step 6: Final answer
    x = 75,418.80

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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.