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Finding the Fourth Proportional to 72,250.91, 108,376.52 and 38,986.64

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Solution

The fourth proportional to 72,250.91, 108,376.52 and 38,986.64 is: 58,480.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,250.91 : 108,376.52 = 38,986.64 : x
  2. Step 2: Convert to fraction form
    72,250.91/108,376.52 = 38,986.64/x
  3. Step 3: Cross multiply
    72,250.91x = 108,376.52 × 38,986.64
  4. Step 4: Simplify right side
    72,250.91x = 4,225,235,632.88
  5. Step 5: Solve for x
    x = 4,225,235,632.88/72,250.91
  6. Step 6: Final answer
    x = 58,480.04

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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.