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Finding the Fourth Proportional to 172,080.80, 258,121.20 and 161,712.80

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Solution

The fourth proportional to 172,080.80, 258,121.20 and 161,712.80 is: 242,569.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,080.80 : 258,121.20 = 161,712.80 : x
  2. Step 2: Convert to fraction form
    172,080.80/258,121.20 = 161,712.80/x
  3. Step 3: Cross multiply
    172,080.80x = 258,121.20 × 161,712.80
  4. Step 4: Simplify right side
    172,080.80x = 41,741,501,991.36
  5. Step 5: Solve for x
    x = 41,741,501,991.36/172,080.80
  6. Step 6: Final answer
    x = 242,569.20

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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.