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Finding the Fourth Proportional to 172,671.32, 259,042.11 and 72,831.87

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Solution

The fourth proportional to 172,671.32, 259,042.11 and 72,831.87 is: 109,262.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,671.32 : 259,042.11 = 72,831.87 : x
  2. Step 2: Convert to fraction form
    172,671.32/259,042.11 = 72,831.87/x
  3. Step 3: Cross multiply
    172,671.32x = 259,042.11 × 72,831.87
  4. Step 4: Simplify right side
    172,671.32x = 18,866,521,280.05
  5. Step 5: Solve for x
    x = 18,866,521,280.05/172,671.32
  6. Step 6: Final answer
    x = 109,262.62

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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.