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Finding the Fourth Proportional to 172,080.45, 258,120.68 and 136,651.05

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Solution

The fourth proportional to 172,080.45, 258,120.68 and 136,651.05 is: 204,976.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,080.45 : 258,120.68 = 136,651.05 : x
  2. Step 2: Convert to fraction form
    172,080.45/258,120.68 = 136,651.05/x
  3. Step 3: Cross multiply
    172,080.45x = 258,120.68 × 136,651.05
  4. Step 4: Simplify right side
    172,080.45x = 35,272,461,265.46
  5. Step 5: Solve for x
    x = 35,272,461,265.46/172,080.45
  6. Step 6: Final answer
    x = 204,976.58

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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.