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Finding the Fourth Proportional to 218,060.16, 327,217.12 and 91,691.24

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Solution

The fourth proportional to 218,060.16, 327,217.12 and 91,691.24 is: 137,590.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,060.16 : 327,217.12 = 91,691.24 : x
  2. Step 2: Convert to fraction form
    218,060.16/327,217.12 = 91,691.24/x
  3. Step 3: Cross multiply
    218,060.16x = 327,217.12 × 91,691.24
  4. Step 4: Simplify right side
    218,060.16x = 30,002,943,482.03
  5. Step 5: Solve for x
    x = 30,002,943,482.03/218,060.16
  6. Step 6: Final answer
    x = 137,590.21

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