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Finding the Fourth Proportional to 172,552.65, 258,863.97 and 72,712.80

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Solution

The fourth proportional to 172,552.65, 258,863.97 and 72,712.80 is: 109,083.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,552.65 : 258,863.97 = 72,712.80 : x
  2. Step 2: Convert to fraction form
    172,552.65/258,863.97 = 72,712.80/x
  3. Step 3: Cross multiply
    172,552.65x = 258,863.97 × 72,712.80
  4. Step 4: Simplify right side
    172,552.65x = 18,822,724,077.82
  5. Step 5: Solve for x
    x = 18,822,724,077.82/172,552.65
  6. Step 6: Final answer
    x = 109,083.95

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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.