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Finding the Fourth Proportional to 54,060.80, 81,031.80 and 18,982.40

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Solution

The fourth proportional to 54,060.80, 81,031.80 and 18,982.40 is: 28,452.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,060.80 : 81,031.80 = 18,982.40 : x
  2. Step 2: Convert to fraction form
    54,060.80/81,031.80 = 18,982.40/x
  3. Step 3: Cross multiply
    54,060.80x = 81,031.80 × 18,982.40
  4. Step 4: Simplify right side
    54,060.80x = 1,538,178,040.32
  5. Step 5: Solve for x
    x = 1,538,178,040.32/54,060.80
  6. Step 6: Final answer
    x = 28,452.74

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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.