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Finding the Fourth Proportional to 220,728.29, 331,141.79 and 80,486.91

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Solution

The fourth proportional to 220,728.29, 331,141.79 and 80,486.91 is: 120,748.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,728.29 : 331,141.79 = 80,486.91 : x
  2. Step 2: Convert to fraction form
    220,728.29/331,141.79 = 80,486.91/x
  3. Step 3: Cross multiply
    220,728.29x = 331,141.79 × 80,486.91
  4. Step 4: Simplify right side
    220,728.29x = 26,652,579,046.53
  5. Step 5: Solve for x
    x = 26,652,579,046.53/220,728.29
  6. Step 6: Final answer
    x = 120,748.36

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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.