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Finding the Fourth Proportional to 220,381.11, 330,377.85 and 87,354.78

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Solution

The fourth proportional to 220,381.11, 330,377.85 and 87,354.78 is: 130,955.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,381.11 : 330,377.85 = 87,354.78 : x
  2. Step 2: Convert to fraction form
    220,381.11/330,377.85 = 87,354.78/x
  3. Step 3: Cross multiply
    220,381.11x = 330,377.85 × 87,354.78
  4. Step 4: Simplify right side
    220,381.11x = 28,860,084,403.62
  5. Step 5: Solve for x
    x = 28,860,084,403.62/220,381.11
  6. Step 6: Final answer
    x = 130,955.35

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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.