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Finding the Fourth Proportional to 218,799.55, 328,012.11 and 83,960.38

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Solution

The fourth proportional to 218,799.55, 328,012.11 and 83,960.38 is: 125,868.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,799.55 : 328,012.11 = 83,960.38 : x
  2. Step 2: Convert to fraction form
    218,799.55/328,012.11 = 83,960.38/x
  3. Step 3: Cross multiply
    218,799.55x = 328,012.11 × 83,960.38
  4. Step 4: Simplify right side
    218,799.55x = 27,540,019,760.14
  5. Step 5: Solve for x
    x = 27,540,019,760.14/218,799.55
  6. Step 6: Final answer
    x = 125,868.73

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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.