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Finding the Fourth Proportional to 115,423.20, 172,843.20 and 92,095.20

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Solution

The fourth proportional to 115,423.20, 172,843.20 and 92,095.20 is: 137,910.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,423.20 : 172,843.20 = 92,095.20 : x
  2. Step 2: Convert to fraction form
    115,423.20/172,843.20 = 92,095.20/x
  3. Step 3: Cross multiply
    115,423.20x = 172,843.20 × 92,095.20
  4. Step 4: Simplify right side
    115,423.20x = 15,918,029,072.64
  5. Step 5: Solve for x
    x = 15,918,029,072.64/115,423.20
  6. Step 6: Final answer
    x = 137,910.13

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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.