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Finding the Fourth Proportional to 67,645.80, 101,468.70 and 28,231.20

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Solution

The fourth proportional to 67,645.80, 101,468.70 and 28,231.20 is: 42,346.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,645.80 : 101,468.70 = 28,231.20 : x
  2. Step 2: Convert to fraction form
    67,645.80/101,468.70 = 28,231.20/x
  3. Step 3: Cross multiply
    67,645.80x = 101,468.70 × 28,231.20
  4. Step 4: Simplify right side
    67,645.80x = 2,864,583,163.44
  5. Step 5: Solve for x
    x = 2,864,583,163.44/67,645.80
  6. Step 6: Final answer
    x = 42,346.80

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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.