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Finding the Fourth Proportional to 54,660, 81,988.56 and 15,215.52

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Solution

The fourth proportional to 54,660, 81,988.56 and 15,215.52 is: 22,822.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,660 : 81,988.56 = 15,215.52 : x
  2. Step 2: Convert to fraction form
    54,660/81,988.56 = 15,215.52/x
  3. Step 3: Cross multiply
    54,660x = 81,988.56 × 15,215.52
  4. Step 4: Simplify right side
    54,660x = 1,247,498,574.45
  5. Step 5: Solve for x
    x = 1,247,498,574.45/54,660
  6. Step 6: Final answer
    x = 22,822.88

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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.