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Finding the Fourth Proportional to 72,882.36, 109,321.62 and 20,295.48

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Solution

The fourth proportional to 72,882.36, 109,321.62 and 20,295.48 is: 30,442.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,882.36 : 109,321.62 = 20,295.48 : x
  2. Step 2: Convert to fraction form
    72,882.36/109,321.62 = 20,295.48/x
  3. Step 3: Cross multiply
    72,882.36x = 109,321.62 × 20,295.48
  4. Step 4: Simplify right side
    72,882.36x = 2,218,734,752.28
  5. Step 5: Solve for x
    x = 2,218,734,752.28/72,882.36
  6. Step 6: Final answer
    x = 30,442.69

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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.