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Finding the Fourth Proportional to 218,428.59, 327,642.65 and 68,681.96

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Solution

The fourth proportional to 218,428.59, 327,642.65 and 68,681.96 is: 103,022.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,428.59 : 327,642.65 = 68,681.96 : x
  2. Step 2: Convert to fraction form
    218,428.59/327,642.65 = 68,681.96/x
  3. Step 3: Cross multiply
    218,428.59x = 327,642.65 × 68,681.96
  4. Step 4: Simplify right side
    218,428.59x = 22,503,139,381.59
  5. Step 5: Solve for x
    x = 22,503,139,381.59/218,428.59
  6. Step 6: Final answer
    x = 103,022.87

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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.