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Finding the Fourth Proportional to 172,061.65, 258,092.49 and 66,905.22

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Solution

The fourth proportional to 172,061.65, 258,092.49 and 66,905.22 is: 100,357.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,061.65 : 258,092.49 = 66,905.22 : x
  2. Step 2: Convert to fraction form
    172,061.65/258,092.49 = 66,905.22/x
  3. Step 3: Cross multiply
    172,061.65x = 258,092.49 × 66,905.22
  4. Step 4: Simplify right side
    172,061.65x = 17,267,736,042.54
  5. Step 5: Solve for x
    x = 17,267,736,042.54/172,061.65
  6. Step 6: Final answer
    x = 100,357.84

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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.