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Finding the Fourth Proportional to 99,718.83, 137,612.79 and 54,397.17

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Solution

The fourth proportional to 99,718.83, 137,612.79 and 54,397.17 is: 75,068.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,718.83 : 137,612.79 = 54,397.17 : x
  2. Step 2: Convert to fraction form
    99,718.83/137,612.79 = 54,397.17/x
  3. Step 3: Cross multiply
    99,718.83x = 137,612.79 × 54,397.17
  4. Step 4: Simplify right side
    99,718.83x = 7,485,746,331.80
  5. Step 5: Solve for x
    x = 7,485,746,331.80/99,718.83
  6. Step 6: Final answer
    x = 75,068.53

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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.