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Finding the Fourth Proportional to 221,505.90, 332,307.45 and 71,720.70

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Solution

The fourth proportional to 221,505.90, 332,307.45 and 71,720.70 is: 107,596.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,505.90 : 332,307.45 = 71,720.70 : x
  2. Step 2: Convert to fraction form
    221,505.90/332,307.45 = 71,720.70/x
  3. Step 3: Cross multiply
    221,505.90x = 332,307.45 × 71,720.70
  4. Step 4: Simplify right side
    221,505.90x = 23,833,322,929.22
  5. Step 5: Solve for x
    x = 23,833,322,929.22/221,505.90
  6. Step 6: Final answer
    x = 107,596.79

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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.