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Finding the Fourth Proportional to 108,708.92, 149,954.76 and 68,358.80

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Solution

The fourth proportional to 108,708.92, 149,954.76 and 68,358.80 is: 94,295.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,708.92 : 149,954.76 = 68,358.80 : x
  2. Step 2: Convert to fraction form
    108,708.92/149,954.76 = 68,358.80/x
  3. Step 3: Cross multiply
    108,708.92x = 149,954.76 × 68,358.80
  4. Step 4: Simplify right side
    108,708.92x = 10,250,727,447.89
  5. Step 5: Solve for x
    x = 10,250,727,447.89/108,708.92
  6. Step 6: Final answer
    x = 94,295.18

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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.