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Finding the Fourth Proportional to 218,780.40, 328,217.04 and 69,063.96

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Solution

The fourth proportional to 218,780.40, 328,217.04 and 69,063.96 is: 103,610.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,780.40 : 328,217.04 = 69,063.96 : x
  2. Step 2: Convert to fraction form
    218,780.40/328,217.04 = 69,063.96/x
  3. Step 3: Cross multiply
    218,780.40x = 328,217.04 × 69,063.96
  4. Step 4: Simplify right side
    218,780.40x = 22,667,968,521.88
  5. Step 5: Solve for x
    x = 22,667,968,521.88/218,780.40
  6. Step 6: Final answer
    x = 103,610.60

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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.