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Finding the Fourth Proportional to 221,578.60, 332,151.90 and 126,711.40

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Solution

The fourth proportional to 221,578.60, 332,151.90 and 126,711.40 is: 189,943.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,578.60 : 332,151.90 = 126,711.40 : x
  2. Step 2: Convert to fraction form
    221,578.60/332,151.90 = 126,711.40/x
  3. Step 3: Cross multiply
    221,578.60x = 332,151.90 × 126,711.40
  4. Step 4: Simplify right side
    221,578.60x = 42,087,432,261.66
  5. Step 5: Solve for x
    x = 42,087,432,261.66/221,578.60
  6. Step 6: Final answer
    x = 189,943.58

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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.