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Finding the Fourth Proportional to 73,108.20, 109,691.10 and 28,727.40

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Solution

The fourth proportional to 73,108.20, 109,691.10 and 28,727.40 is: 43,102.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,108.20 : 109,691.10 = 28,727.40 : x
  2. Step 2: Convert to fraction form
    73,108.20/109,691.10 = 28,727.40/x
  3. Step 3: Cross multiply
    73,108.20x = 109,691.10 × 28,727.40
  4. Step 4: Simplify right side
    73,108.20x = 3,151,140,106.14
  5. Step 5: Solve for x
    x = 3,151,140,106.14/73,108.20
  6. Step 6: Final answer
    x = 43,102.42

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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.