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Finding the Fourth Proportional to 161,969.70, 242,845.20 and 86,080.80

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Solution

The fourth proportional to 161,969.70, 242,845.20 and 86,080.80 is: 129,063.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,969.70 : 242,845.20 = 86,080.80 : x
  2. Step 2: Convert to fraction form
    161,969.70/242,845.20 = 86,080.80/x
  3. Step 3: Cross multiply
    161,969.70x = 242,845.20 × 86,080.80
  4. Step 4: Simplify right side
    161,969.70x = 20,904,309,092.16
  5. Step 5: Solve for x
    x = 20,904,309,092.16/161,969.70
  6. Step 6: Final answer
    x = 129,063.08

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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.