Home / 96,831.20-145,246.80-81,279.20

Finding the Fourth Proportional to 96,831.20, 145,246.80 and 81,279.20

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Solution

The fourth proportional to 96,831.20, 145,246.80 and 81,279.20 is: 121,918.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    96,831.20 : 145,246.80 = 81,279.20 : x
  2. Step 2: Convert to fraction form
    96,831.20/145,246.80 = 81,279.20/x
  3. Step 3: Cross multiply
    96,831.20x = 145,246.80 × 81,279.20
  4. Step 4: Simplify right side
    96,831.20x = 11,805,543,706.56
  5. Step 5: Solve for x
    x = 11,805,543,706.56/96,831.20
  6. Step 6: Final answer
    x = 121,918.80

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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.