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Finding the Fourth Proportional to 68,831.94, 102,781.68 and 54,632.64

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Solution

The fourth proportional to 68,831.94, 102,781.68 and 54,632.64 is: 81,578.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,831.94 : 102,781.68 = 54,632.64 : x
  2. Step 2: Convert to fraction form
    68,831.94/102,781.68 = 54,632.64/x
  3. Step 3: Cross multiply
    68,831.94x = 102,781.68 × 54,632.64
  4. Step 4: Simplify right side
    68,831.94x = 5,615,234,522.04
  5. Step 5: Solve for x
    x = 5,615,234,522.04/68,831.94
  6. Step 6: Final answer
    x = 81,578.91

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.