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Finding the Fourth Proportional to 73,309.68, 109,954.80 and 20,723.28

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Solution

The fourth proportional to 73,309.68, 109,954.80 and 20,723.28 is: 31,082.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,309.68 : 109,954.80 = 20,723.28 : x
  2. Step 2: Convert to fraction form
    73,309.68/109,954.80 = 20,723.28/x
  3. Step 3: Cross multiply
    73,309.68x = 109,954.80 × 20,723.28
  4. Step 4: Simplify right side
    73,309.68x = 2,278,624,107.74
  5. Step 5: Solve for x
    x = 2,278,624,107.74/73,309.68
  6. Step 6: Final answer
    x = 31,082.17

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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.