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Finding the Fourth Proportional to 221,748.86, 332,675.76 and 71,988.86

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Solution

The fourth proportional to 221,748.86, 332,675.76 and 71,988.86 is: 108,000.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,748.86 : 332,675.76 = 71,988.86 : x
  2. Step 2: Convert to fraction form
    221,748.86/332,675.76 = 71,988.86/x
  3. Step 3: Cross multiply
    221,748.86x = 332,675.76 × 71,988.86
  4. Step 4: Simplify right side
    221,748.86x = 23,948,948,712.03
  5. Step 5: Solve for x
    x = 23,948,948,712.03/221,748.86
  6. Step 6: Final answer
    x = 108,000.32

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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.