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Finding the Fourth Proportional to 54,173.20, 81,101.40 and 38,621.20

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Solution

The fourth proportional to 54,173.20, 81,101.40 and 38,621.20 is: 57,818.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,173.20 : 81,101.40 = 38,621.20 : x
  2. Step 2: Convert to fraction form
    54,173.20/81,101.40 = 38,621.20/x
  3. Step 3: Cross multiply
    54,173.20x = 81,101.40 × 38,621.20
  4. Step 4: Simplify right side
    54,173.20x = 3,132,233,389.68
  5. Step 5: Solve for x
    x = 3,132,233,389.68/54,173.20
  6. Step 6: Final answer
    x = 57,818.87

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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.