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Finding the Fourth Proportional to 108,687.92, 149,831.84 and 76,323.96

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Solution

The fourth proportional to 108,687.92, 149,831.84 and 76,323.96 is: 105,216.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,687.92 : 149,831.84 = 76,323.96 : x
  2. Step 2: Convert to fraction form
    108,687.92/149,831.84 = 76,323.96/x
  3. Step 3: Cross multiply
    108,687.92x = 149,831.84 × 76,323.96
  4. Step 4: Simplify right side
    108,687.92x = 11,435,759,553.70
  5. Step 5: Solve for x
    x = 11,435,759,553.70/108,687.92
  6. Step 6: Final answer
    x = 105,216.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.