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Finding the Fourth Proportional to 72,691.38, 109,079.37 and 30,568.41

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Solution

The fourth proportional to 72,691.38, 109,079.37 and 30,568.41 is: 45,870.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,691.38 : 109,079.37 = 30,568.41 : x
  2. Step 2: Convert to fraction form
    72,691.38/109,079.37 = 30,568.41/x
  3. Step 3: Cross multiply
    72,691.38x = 109,079.37 × 30,568.41
  4. Step 4: Simplify right side
    72,691.38x = 3,334,382,904.70
  5. Step 5: Solve for x
    x = 3,334,382,904.70/72,691.38
  6. Step 6: Final answer
    x = 45,870.40

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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.