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Finding the Fourth Proportional to 54,972.80, 82,459.20 and 18,036.80

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Solution

The fourth proportional to 54,972.80, 82,459.20 and 18,036.80 is: 27,055.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,972.80 : 82,459.20 = 18,036.80 : x
  2. Step 2: Convert to fraction form
    54,972.80/82,459.20 = 18,036.80/x
  3. Step 3: Cross multiply
    54,972.80x = 82,459.20 × 18,036.80
  4. Step 4: Simplify right side
    54,972.80x = 1,487,300,098.56
  5. Step 5: Solve for x
    x = 1,487,300,098.56/54,972.80
  6. Step 6: Final answer
    x = 27,055.20

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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.