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Finding the Fourth Proportional to 99,279, 137,007.18 and 54,567

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Solution

The fourth proportional to 99,279, 137,007.18 and 54,567 is: 75,303.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,279 : 137,007.18 = 54,567 : x
  2. Step 2: Convert to fraction form
    99,279/137,007.18 = 54,567/x
  3. Step 3: Cross multiply
    99,279x = 137,007.18 × 54,567
  4. Step 4: Simplify right side
    99,279x = 7,476,070,791.06
  5. Step 5: Solve for x
    x = 7,476,070,791.06/99,279
  6. Step 6: Final answer
    x = 75,303.65

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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.