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Finding the Fourth Proportional to 221,156.80, 331,864.80 and 80,929.60

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Solution

The fourth proportional to 221,156.80, 331,864.80 and 80,929.60 is: 121,441.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,156.80 : 331,864.80 = 80,929.60 : x
  2. Step 2: Convert to fraction form
    221,156.80/331,864.80 = 80,929.60/x
  3. Step 3: Cross multiply
    221,156.80x = 331,864.80 × 80,929.60
  4. Step 4: Simplify right side
    221,156.80x = 26,857,685,518.08
  5. Step 5: Solve for x
    x = 26,857,685,518.08/221,156.80
  6. Step 6: Final answer
    x = 121,441.83

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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.