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Finding the Fourth Proportional to 220,393.85, 330,396.98 and 87,367.55

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Solution

The fourth proportional to 220,393.85, 330,396.98 and 87,367.55 is: 130,974.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,393.85 : 330,396.98 = 87,367.55 : x
  2. Step 2: Convert to fraction form
    220,393.85/330,396.98 = 87,367.55/x
  3. Step 3: Cross multiply
    220,393.85x = 330,396.98 × 87,367.55
  4. Step 4: Simplify right side
    220,393.85x = 28,865,972,581.18
  5. Step 5: Solve for x
    x = 28,865,972,581.18/220,393.85
  6. Step 6: Final answer
    x = 130,974.50

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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.