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Finding the Fourth Proportional to 52,879.43, 79,283.66 and 20,829.20

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Solution

The fourth proportional to 52,879.43, 79,283.66 and 20,829.20 is: 31,229.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,879.43 : 79,283.66 = 20,829.20 : x
  2. Step 2: Convert to fraction form
    52,879.43/79,283.66 = 20,829.20/x
  3. Step 3: Cross multiply
    52,879.43x = 79,283.66 × 20,829.20
  4. Step 4: Simplify right side
    52,879.43x = 1,651,414,710.31
  5. Step 5: Solve for x
    x = 1,651,414,710.31/52,879.43
  6. Step 6: Final answer
    x = 31,229.81

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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.