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Finding the Fourth Proportional to 72,549.10, 108,815.46 and 19,951.75

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Solution

The fourth proportional to 72,549.10, 108,815.46 and 19,951.75 is: 29,925.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,549.10 : 108,815.46 = 19,951.75 : x
  2. Step 2: Convert to fraction form
    72,549.10/108,815.46 = 19,951.75/x
  3. Step 3: Cross multiply
    72,549.10x = 108,815.46 × 19,951.75
  4. Step 4: Simplify right side
    72,549.10x = 2,171,058,854.06
  5. Step 5: Solve for x
    x = 2,171,058,854.06/72,549.10
  6. Step 6: Final answer
    x = 29,925.37

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.