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Finding the Fourth Proportional to 221,251.40, 331,838.70 and 80,937.80

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Solution

The fourth proportional to 221,251.40, 331,838.70 and 80,937.80 is: 121,392.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,251.40 : 331,838.70 = 80,937.80 : x
  2. Step 2: Convert to fraction form
    221,251.40/331,838.70 = 80,937.80/x
  3. Step 3: Cross multiply
    221,251.40x = 331,838.70 × 80,937.80
  4. Step 4: Simplify right side
    221,251.40x = 26,858,294,332.86
  5. Step 5: Solve for x
    x = 26,858,294,332.86/221,251.40
  6. Step 6: Final answer
    x = 121,392.65

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1.5x scale

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.