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Finding the Fourth Proportional to 220,544.10, 330,902.55 and 87,401.70

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Solution

The fourth proportional to 220,544.10, 330,902.55 and 87,401.70 is: 131,136.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,544.10 : 330,902.55 = 87,401.70 : x
  2. Step 2: Convert to fraction form
    220,544.10/330,902.55 = 87,401.70/x
  3. Step 3: Cross multiply
    220,544.10x = 330,902.55 × 87,401.70
  4. Step 4: Simplify right side
    220,544.10x = 28,921,445,404.34
  5. Step 5: Solve for x
    x = 28,921,445,404.34/220,544.10
  6. Step 6: Final answer
    x = 131,136.79

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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.