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Finding the Fourth Proportional to 73,212.48, 109,825.56 and 20,621.88

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Solution

The fourth proportional to 73,212.48, 109,825.56 and 20,621.88 is: 30,934.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,212.48 : 109,825.56 = 20,621.88 : x
  2. Step 2: Convert to fraction form
    73,212.48/109,825.56 = 20,621.88/x
  3. Step 3: Cross multiply
    73,212.48x = 109,825.56 × 20,621.88
  4. Step 4: Simplify right side
    73,212.48x = 2,264,809,519.25
  5. Step 5: Solve for x
    x = 2,264,809,519.25/73,212.48
  6. Step 6: Final answer
    x = 30,934.75

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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.