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Finding the Fourth Proportional to 73,012.79, 109,472.11 and 28,644.03

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Solution

The fourth proportional to 73,012.79, 109,472.11 and 28,644.03 is: 42,947.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,012.79 : 109,472.11 = 28,644.03 : x
  2. Step 2: Convert to fraction form
    73,012.79/109,472.11 = 28,644.03/x
  3. Step 3: Cross multiply
    73,012.79x = 109,472.11 × 28,644.03
  4. Step 4: Simplify right side
    73,012.79x = 3,135,722,331.39
  5. Step 5: Solve for x
    x = 3,135,722,331.39/73,012.79
  6. Step 6: Final answer
    x = 42,947.57

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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.