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Finding the Fourth Proportional to 68,720.92, 103,079.76 and 21,974.20

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Solution

The fourth proportional to 68,720.92, 103,079.76 and 21,974.20 is: 32,960.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,720.92 : 103,079.76 = 21,974.20 : x
  2. Step 2: Convert to fraction form
    68,720.92/103,079.76 = 21,974.20/x
  3. Step 3: Cross multiply
    68,720.92x = 103,079.76 × 21,974.20
  4. Step 4: Simplify right side
    68,720.92x = 2,265,095,262.19
  5. Step 5: Solve for x
    x = 2,265,095,262.19/68,720.92
  6. Step 6: Final answer
    x = 32,960.78

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1.5x scale

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.