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Finding the Fourth Proportional to 172,831.20, 259,246.80 and 155,320.80

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Solution

The fourth proportional to 172,831.20, 259,246.80 and 155,320.80 is: 232,981.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,831.20 : 259,246.80 = 155,320.80 : x
  2. Step 2: Convert to fraction form
    172,831.20/259,246.80 = 155,320.80/x
  3. Step 3: Cross multiply
    172,831.20x = 259,246.80 × 155,320.80
  4. Step 4: Simplify right side
    172,831.20x = 40,266,420,373.44
  5. Step 5: Solve for x
    x = 40,266,420,373.44/172,831.20
  6. Step 6: Final answer
    x = 232,981.20

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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.