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Finding the Fourth Proportional to 99,618.50, 137,472.64 and 54,296.48

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Solution

The fourth proportional to 99,618.50, 137,472.64 and 54,296.48 is: 74,928.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,618.50 : 137,472.64 = 54,296.48 : x
  2. Step 2: Convert to fraction form
    99,618.50/137,472.64 = 54,296.48/x
  3. Step 3: Cross multiply
    99,618.50x = 137,472.64 × 54,296.48
  4. Step 4: Simplify right side
    99,618.50x = 7,464,279,625.20
  5. Step 5: Solve for x
    x = 7,464,279,625.20/99,618.50
  6. Step 6: Final answer
    x = 74,928.65

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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.