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Finding the Fourth Proportional to 178,831.20, 268,279.20 and 89,860.80

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Solution

The fourth proportional to 178,831.20, 268,279.20 and 89,860.80 is: 134,807.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,831.20 : 268,279.20 = 89,860.80 : x
  2. Step 2: Convert to fraction form
    178,831.20/268,279.20 = 89,860.80/x
  3. Step 3: Cross multiply
    178,831.20x = 268,279.20 × 89,860.80
  4. Step 4: Simplify right side
    178,831.20x = 24,107,783,535.36
  5. Step 5: Solve for x
    x = 24,107,783,535.36/178,831.20
  6. Step 6: Final answer
    x = 134,807.48

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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.