Home / 99,721.16-137,612.66-54,400.20

Finding the Fourth Proportional to 99,721.16, 137,612.66 and 54,400.20

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Solution

The fourth proportional to 99,721.16, 137,612.66 and 54,400.20 is: 75,070.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,721.16 : 137,612.66 = 54,400.20 : x
  2. Step 2: Convert to fraction form
    99,721.16/137,612.66 = 54,400.20/x
  3. Step 3: Cross multiply
    99,721.16x = 137,612.66 × 54,400.20
  4. Step 4: Simplify right side
    99,721.16x = 7,486,156,226.53
  5. Step 5: Solve for x
    x = 7,486,156,226.53/99,721.16
  6. Step 6: Final answer
    x = 75,070.89

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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.