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Finding the Fourth Proportional to 99,433.39, 137,218.08 and 54,721.39

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Solution

The fourth proportional to 99,433.39, 137,218.08 and 54,721.39 is: 75,515.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,433.39 : 137,218.08 = 54,721.39 : x
  2. Step 2: Convert to fraction form
    99,433.39/137,218.08 = 54,721.39/x
  3. Step 3: Cross multiply
    99,433.39x = 137,218.08 × 54,721.39
  4. Step 4: Simplify right side
    99,433.39x = 7,508,764,070.73
  5. Step 5: Solve for x
    x = 7,508,764,070.73/99,433.39
  6. Step 6: Final answer
    x = 75,515.52

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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.