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Finding the Fourth Proportional to 220,580.64, 330,853.68 and 80,370.72

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Solution

The fourth proportional to 220,580.64, 330,853.68 and 80,370.72 is: 120,549.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,580.64 : 330,853.68 = 80,370.72 : x
  2. Step 2: Convert to fraction form
    220,580.64/330,853.68 = 80,370.72/x
  3. Step 3: Cross multiply
    220,580.64x = 330,853.68 × 80,370.72
  4. Step 4: Simplify right side
    220,580.64x = 26,590,948,476.25
  5. Step 5: Solve for x
    x = 26,590,948,476.25/220,580.64
  6. Step 6: Final answer
    x = 120,549.78

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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.