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Finding the Fourth Proportional to 221,647.52, 332,319.40 and 79,489.76

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Solution

The fourth proportional to 221,647.52, 332,319.40 and 79,489.76 is: 119,180.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,647.52 : 332,319.40 = 79,489.76 : x
  2. Step 2: Convert to fraction form
    221,647.52/332,319.40 = 79,489.76/x
  3. Step 3: Cross multiply
    221,647.52x = 332,319.40 × 79,489.76
  4. Step 4: Simplify right side
    221,647.52x = 26,415,987,489.02
  5. Step 5: Solve for x
    x = 26,415,987,489.02/221,647.52
  6. Step 6: Final answer
    x = 119,180.16

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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.