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Finding the Fourth Proportional to 71,976.52, 107,989.62 and 29,879.20

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Solution

The fourth proportional to 71,976.52, 107,989.62 and 29,879.20 is: 44,829.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,976.52 : 107,989.62 = 29,879.20 : x
  2. Step 2: Convert to fraction form
    71,976.52/107,989.62 = 29,879.20/x
  3. Step 3: Cross multiply
    71,976.52x = 107,989.62 × 29,879.20
  4. Step 4: Simplify right side
    71,976.52x = 3,226,643,453.90
  5. Step 5: Solve for x
    x = 3,226,643,453.90/71,976.52
  6. Step 6: Final answer
    x = 44,829.11

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1.5x scale

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.