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Finding the Fourth Proportional to 172,418.70, 258,628.05 and 113,321.10

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Solution

The fourth proportional to 172,418.70, 258,628.05 and 113,321.10 is: 169,981.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,418.70 : 258,628.05 = 113,321.10 : x
  2. Step 2: Convert to fraction form
    172,418.70/258,628.05 = 113,321.10/x
  3. Step 3: Cross multiply
    172,418.70x = 258,628.05 × 113,321.10
  4. Step 4: Simplify right side
    172,418.70x = 29,308,015,116.86
  5. Step 5: Solve for x
    x = 29,308,015,116.86/172,418.70
  6. Step 6: Final answer
    x = 169,981.65

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Similar ratio
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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.