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Finding the Fourth Proportional to 220,116.34, 330,305.68 and 79,885.90

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Solution

The fourth proportional to 220,116.34, 330,305.68 and 79,885.90 is: 119,876.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,116.34 : 330,305.68 = 79,885.90 : x
  2. Step 2: Convert to fraction form
    220,116.34/330,305.68 = 79,885.90/x
  3. Step 3: Cross multiply
    220,116.34x = 330,305.68 × 79,885.90
  4. Step 4: Simplify right side
    220,116.34x = 26,386,766,521.91
  5. Step 5: Solve for x
    x = 26,386,766,521.91/220,116.34
  6. Step 6: Final answer
    x = 119,876.45

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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.