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Finding the Fourth Proportional to 99,572.71, 137,409.57 and 54,250.55

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Solution

The fourth proportional to 99,572.71, 137,409.57 and 54,250.55 is: 74,865.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,572.71 : 137,409.57 = 54,250.55 : x
  2. Step 2: Convert to fraction form
    99,572.71/137,409.57 = 54,250.55/x
  3. Step 3: Cross multiply
    99,572.71x = 137,409.57 × 54,250.55
  4. Step 4: Simplify right side
    99,572.71x = 7,454,543,789.46
  5. Step 5: Solve for x
    x = 7,454,543,789.46/99,572.71
  6. Step 6: Final answer
    x = 74,865.33

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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.