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Finding the Fourth Proportional to 221,920.40, 332,686.20 and 133,079.60

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Solution

The fourth proportional to 221,920.40, 332,686.20 and 133,079.60 is: 199,502.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,920.40 : 332,686.20 = 133,079.60 : x
  2. Step 2: Convert to fraction form
    221,920.40/332,686.20 = 133,079.60/x
  3. Step 3: Cross multiply
    221,920.40x = 332,686.20 × 133,079.60
  4. Step 4: Simplify right side
    221,920.40x = 44,273,746,421.52
  5. Step 5: Solve for x
    x = 44,273,746,421.52/221,920.40
  6. Step 6: Final answer
    x = 199,502.82

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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.