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Finding the Fourth Proportional to 218,789.96, 328,184.94 and 69,045.40

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Solution

The fourth proportional to 218,789.96, 328,184.94 and 69,045.40 is: 103,568.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,789.96 : 328,184.94 = 69,045.40 : x
  2. Step 2: Convert to fraction form
    218,789.96/328,184.94 = 69,045.40/x
  3. Step 3: Cross multiply
    218,789.96x = 328,184.94 × 69,045.40
  4. Step 4: Simplify right side
    218,789.96x = 22,659,660,456.28
  5. Step 5: Solve for x
    x = 22,659,660,456.28/218,789.96
  6. Step 6: Final answer
    x = 103,568.10

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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.