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Finding the Fourth Proportional to 218,899.18, 328,367.40 and 69,099.40

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Solution

The fourth proportional to 218,899.18, 328,367.40 and 69,099.40 is: 103,654.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,899.18 : 328,367.40 = 69,099.40 : x
  2. Step 2: Convert to fraction form
    218,899.18/328,367.40 = 69,099.40/x
  3. Step 3: Cross multiply
    218,899.18x = 328,367.40 × 69,099.40
  4. Step 4: Simplify right side
    218,899.18x = 22,689,990,319.56
  5. Step 5: Solve for x
    x = 22,689,990,319.56/218,899.18
  6. Step 6: Final answer
    x = 103,654.98

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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.