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Finding the Fourth Proportional to 54,509.60, 81,764.40 and 17,072.80

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Solution

The fourth proportional to 54,509.60, 81,764.40 and 17,072.80 is: 25,609.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,509.60 : 81,764.40 = 17,072.80 : x
  2. Step 2: Convert to fraction form
    54,509.60/81,764.40 = 17,072.80/x
  3. Step 3: Cross multiply
    54,509.60x = 81,764.40 × 17,072.80
  4. Step 4: Simplify right side
    54,509.60x = 1,395,947,248.32
  5. Step 5: Solve for x
    x = 1,395,947,248.32/54,509.60
  6. Step 6: Final answer
    x = 25,609.20

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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.