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Finding the Fourth Proportional to 172,042.05, 258,147.60 and 77,339.13

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Solution

The fourth proportional to 172,042.05, 258,147.60 and 77,339.13 is: 116,046.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,042.05 : 258,147.60 = 77,339.13 : x
  2. Step 2: Convert to fraction form
    172,042.05/258,147.60 = 77,339.13/x
  3. Step 3: Cross multiply
    172,042.05x = 258,147.60 × 77,339.13
  4. Step 4: Simplify right side
    172,042.05x = 19,964,910,795.59
  5. Step 5: Solve for x
    x = 19,964,910,795.59/172,042.05
  6. Step 6: Final answer
    x = 116,046.69

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1.5x scale

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.