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Finding the Fourth Proportional to 67,696.32, 101,560.68 and 20,949.20

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Solution

The fourth proportional to 67,696.32, 101,560.68 and 20,949.20 is: 31,428.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,696.32 : 101,560.68 = 20,949.20 : x
  2. Step 2: Convert to fraction form
    67,696.32/101,560.68 = 20,949.20/x
  3. Step 3: Cross multiply
    67,696.32x = 101,560.68 × 20,949.20
  4. Step 4: Simplify right side
    67,696.32x = 2,127,614,997.46
  5. Step 5: Solve for x
    x = 2,127,614,997.46/67,696.32
  6. Step 6: Final answer
    x = 31,428.81

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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.