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Finding the Fourth Proportional to 73,282.55, 109,928.07 and 20,687.63

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Solution

The fourth proportional to 73,282.55, 109,928.07 and 20,687.63 is: 31,032.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,282.55 : 109,928.07 = 20,687.63 : x
  2. Step 2: Convert to fraction form
    73,282.55/109,928.07 = 20,687.63/x
  3. Step 3: Cross multiply
    73,282.55x = 109,928.07 × 20,687.63
  4. Step 4: Simplify right side
    73,282.55x = 2,274,150,689.13
  5. Step 5: Solve for x
    x = 2,274,150,689.13/73,282.55
  6. Step 6: Final answer
    x = 31,032.64

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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.