Home / 99,972.30-137,962.05-54,650.82

Finding the Fourth Proportional to 99,972.30, 137,962.05 and 54,650.82

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Solution

The fourth proportional to 99,972.30, 137,962.05 and 54,650.82 is: 75,418.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,972.30 : 137,962.05 = 54,650.82 : x
  2. Step 2: Convert to fraction form
    99,972.30/137,962.05 = 54,650.82/x
  3. Step 3: Cross multiply
    99,972.30x = 137,962.05 × 54,650.82
  4. Step 4: Simplify right side
    99,972.30x = 7,539,739,161.38
  5. Step 5: Solve for x
    x = 7,539,739,161.38/99,972.30
  6. Step 6: Final answer
    x = 75,418.28

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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.