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Finding the Fourth Proportional to 172,891.55, 258,832.95 and 106,129.28

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Solution

The fourth proportional to 172,891.55, 258,832.95 and 106,129.28 is: 158,884.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,891.55 : 258,832.95 = 106,129.28 : x
  2. Step 2: Convert to fraction form
    172,891.55/258,832.95 = 106,129.28/x
  3. Step 3: Cross multiply
    172,891.55x = 258,832.95 × 106,129.28
  4. Step 4: Simplify right side
    172,891.55x = 27,469,754,623.78
  5. Step 5: Solve for x
    x = 27,469,754,623.78/172,891.55
  6. Step 6: Final answer
    x = 158,884.31

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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.