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Finding the Fourth Proportional to 172,086.45, 258,129.68 and 53,757.92

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Solution

The fourth proportional to 172,086.45, 258,129.68 and 53,757.92 is: 80,636.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,086.45 : 258,129.68 = 53,757.92 : x
  2. Step 2: Convert to fraction form
    172,086.45/258,129.68 = 53,757.92/x
  3. Step 3: Cross multiply
    172,086.45x = 258,129.68 × 53,757.92
  4. Step 4: Simplify right side
    172,086.45x = 13,876,513,127.63
  5. Step 5: Solve for x
    x = 13,876,513,127.63/172,086.45
  6. Step 6: Final answer
    x = 80,636.87

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1.5x scale

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.