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Finding the Fourth Proportional to 172,571.80, 258,703.80 and 67,366.30

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Solution

The fourth proportional to 172,571.80, 258,703.80 and 67,366.30 is: 100,989.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,571.80 : 258,703.80 = 67,366.30 : x
  2. Step 2: Convert to fraction form
    172,571.80/258,703.80 = 67,366.30/x
  3. Step 3: Cross multiply
    172,571.80x = 258,703.80 × 67,366.30
  4. Step 4: Simplify right side
    172,571.80x = 17,427,917,801.94
  5. Step 5: Solve for x
    x = 17,427,917,801.94/172,571.80
  6. Step 6: Final answer
    x = 100,989.37

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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.