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Finding the Fourth Proportional to 169,234.48, 253,851.72 and 86,186.80

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Solution

The fourth proportional to 169,234.48, 253,851.72 and 86,186.80 is: 129,280.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,234.48 : 253,851.72 = 86,186.80 : x
  2. Step 2: Convert to fraction form
    169,234.48/253,851.72 = 86,186.80/x
  3. Step 3: Cross multiply
    169,234.48x = 253,851.72 × 86,186.80
  4. Step 4: Simplify right side
    169,234.48x = 21,878,667,421.30
  5. Step 5: Solve for x
    x = 21,878,667,421.30/169,234.48
  6. Step 6: Final answer
    x = 129,280.20

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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.