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Finding the Fourth Proportional to 45,310.80, 67,824.72 and 28,645.86

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Solution

The fourth proportional to 45,310.80, 67,824.72 and 28,645.86 is: 42,879.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,310.80 : 67,824.72 = 28,645.86 : x
  2. Step 2: Convert to fraction form
    45,310.80/67,824.72 = 28,645.86/x
  3. Step 3: Cross multiply
    45,310.80x = 67,824.72 × 28,645.86
  4. Step 4: Simplify right side
    45,310.80x = 1,942,897,433.66
  5. Step 5: Solve for x
    x = 1,942,897,433.66/45,310.80
  6. Step 6: Final answer
    x = 42,879.35

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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.