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Finding the Fourth Proportional to 73,121.94, 109,682.46 and 20,531.46

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Solution

The fourth proportional to 73,121.94, 109,682.46 and 20,531.46 is: 30,797.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,121.94 : 109,682.46 = 20,531.46 : x
  2. Step 2: Convert to fraction form
    73,121.94/109,682.46 = 20,531.46/x
  3. Step 3: Cross multiply
    73,121.94x = 109,682.46 × 20,531.46
  4. Step 4: Simplify right side
    73,121.94x = 2,251,941,040.19
  5. Step 5: Solve for x
    x = 2,251,941,040.19/73,121.94
  6. Step 6: Final answer
    x = 30,797.06

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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.