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Finding the Fourth Proportional to 172,972.11, 259,489.52 and 78,246.91

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Solution

The fourth proportional to 172,972.11, 259,489.52 and 78,246.91 is: 117,384.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,972.11 : 259,489.52 = 78,246.91 : x
  2. Step 2: Convert to fraction form
    172,972.11/259,489.52 = 78,246.91/x
  3. Step 3: Cross multiply
    172,972.11x = 259,489.52 × 78,246.91
  4. Step 4: Simplify right side
    172,972.11x = 20,304,253,784.08
  5. Step 5: Solve for x
    x = 20,304,253,784.08/172,972.11
  6. Step 6: Final answer
    x = 117,384.55

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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.