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Finding the Fourth Proportional to 217,176.90, 325,765.35 and 76,949.70

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Solution

The fourth proportional to 217,176.90, 325,765.35 and 76,949.70 is: 115,424.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,176.90 : 325,765.35 = 76,949.70 : x
  2. Step 2: Convert to fraction form
    217,176.90/325,765.35 = 76,949.70/x
  3. Step 3: Cross multiply
    217,176.90x = 325,765.35 × 76,949.70
  4. Step 4: Simplify right side
    217,176.90x = 25,067,545,952.90
  5. Step 5: Solve for x
    x = 25,067,545,952.90/217,176.90
  6. Step 6: Final answer
    x = 115,424.55

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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.