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Finding the Fourth Proportional to 72,251.16, 108,376.89 and 38,986.89

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Solution

The fourth proportional to 72,251.16, 108,376.89 and 38,986.89 is: 58,480.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,251.16 : 108,376.89 = 38,986.89 : x
  2. Step 2: Convert to fraction form
    72,251.16/108,376.89 = 38,986.89/x
  3. Step 3: Cross multiply
    72,251.16x = 108,376.89 × 38,986.89
  4. Step 4: Simplify right side
    72,251.16x = 4,225,277,888.97
  5. Step 5: Solve for x
    x = 4,225,277,888.97/72,251.16
  6. Step 6: Final answer
    x = 58,480.42

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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.