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Finding the Fourth Proportional to 218,799.70, 328,012.33 and 83,960.53

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Solution

The fourth proportional to 218,799.70, 328,012.33 and 83,960.53 is: 125,868.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,799.70 : 328,012.33 = 83,960.53 : x
  2. Step 2: Convert to fraction form
    218,799.70/328,012.33 = 83,960.53/x
  3. Step 3: Cross multiply
    218,799.70x = 328,012.33 × 83,960.53
  4. Step 4: Simplify right side
    218,799.70x = 27,540,089,073.33
  5. Step 5: Solve for x
    x = 27,540,089,073.33/218,799.70
  6. Step 6: Final answer
    x = 125,868.95

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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.