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Finding the Fourth Proportional to 172,109.66, 258,265.61 and 72,262.17

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Solution

The fourth proportional to 172,109.66, 258,265.61 and 72,262.17 is: 108,435.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,109.66 : 258,265.61 = 72,262.17 : x
  2. Step 2: Convert to fraction form
    172,109.66/258,265.61 = 72,262.17/x
  3. Step 3: Cross multiply
    172,109.66x = 258,265.61 × 72,262.17
  4. Step 4: Simplify right side
    172,109.66x = 18,662,833,414.97
  5. Step 5: Solve for x
    x = 18,662,833,414.97/172,109.66
  6. Step 6: Final answer
    x = 108,435.71

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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.