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Finding the Fourth Proportional to 99,571.52, 137,410.28 and 54,251.64

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Solution

The fourth proportional to 99,571.52, 137,410.28 and 54,251.64 is: 74,868.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,571.52 : 137,410.28 = 54,251.64 : x
  2. Step 2: Convert to fraction form
    99,571.52/137,410.28 = 54,251.64/x
  3. Step 3: Cross multiply
    99,571.52x = 137,410.28 × 54,251.64
  4. Step 4: Simplify right side
    99,571.52x = 7,454,733,042.86
  5. Step 5: Solve for x
    x = 7,454,733,042.86/99,571.52
  6. Step 6: Final answer
    x = 74,868.13

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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.