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Finding the Fourth Proportional to 67,991.10, 102,023.10 and 28,552.20

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Solution

The fourth proportional to 67,991.10, 102,023.10 and 28,552.20 is: 42,843.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,991.10 : 102,023.10 = 28,552.20 : x
  2. Step 2: Convert to fraction form
    67,991.10/102,023.10 = 28,552.20/x
  3. Step 3: Cross multiply
    67,991.10x = 102,023.10 × 28,552.20
  4. Step 4: Simplify right side
    67,991.10x = 2,912,983,955.82
  5. Step 5: Solve for x
    x = 2,912,983,955.82/67,991.10
  6. Step 6: Final answer
    x = 42,843.61

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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.