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Finding the Fourth Proportional to 172,345.10, 258,712.05 and 133,076.30

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Solution

The fourth proportional to 172,345.10, 258,712.05 and 133,076.30 is: 199,764.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,345.10 : 258,712.05 = 133,076.30 : x
  2. Step 2: Convert to fraction form
    172,345.10/258,712.05 = 133,076.30/x
  3. Step 3: Cross multiply
    172,345.10x = 258,712.05 × 133,076.30
  4. Step 4: Simplify right side
    172,345.10x = 34,428,442,379.42
  5. Step 5: Solve for x
    x = 34,428,442,379.42/172,345.10
  6. Step 6: Final answer
    x = 199,764.56

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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.