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Finding the Fourth Proportional to 221,456.40, 332,184.60 and 103,139.70

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Solution

The fourth proportional to 221,456.40, 332,184.60 and 103,139.70 is: 154,709.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,456.40 : 332,184.60 = 103,139.70 : x
  2. Step 2: Convert to fraction form
    221,456.40/332,184.60 = 103,139.70/x
  3. Step 3: Cross multiply
    221,456.40x = 332,184.60 × 103,139.70
  4. Step 4: Simplify right side
    221,456.40x = 34,261,419,988.62
  5. Step 5: Solve for x
    x = 34,261,419,988.62/221,456.40
  6. Step 6: Final answer
    x = 154,709.55

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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.