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Finding the Fourth Proportional to 218,889, 327,908.66 and 143,781.24

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Solution

The fourth proportional to 218,889, 327,908.66 and 143,781.24 is: 215,392.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,889 : 327,908.66 = 143,781.24 : x
  2. Step 2: Convert to fraction form
    218,889/327,908.66 = 143,781.24/x
  3. Step 3: Cross multiply
    218,889x = 327,908.66 × 143,781.24
  4. Step 4: Simplify right side
    218,889x = 47,147,114,252.29
  5. Step 5: Solve for x
    x = 47,147,114,252.29/218,889
  6. Step 6: Final answer
    x = 215,392.80

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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.