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Finding the Fourth Proportional to 54,020.60, 81,006.60 and 20,729.60

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Solution

The fourth proportional to 54,020.60, 81,006.60 and 20,729.60 is: 31,085.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,020.60 : 81,006.60 = 20,729.60 : x
  2. Step 2: Convert to fraction form
    54,020.60/81,006.60 = 20,729.60/x
  3. Step 3: Cross multiply
    54,020.60x = 81,006.60 × 20,729.60
  4. Step 4: Simplify right side
    54,020.60x = 1,679,234,415.36
  5. Step 5: Solve for x
    x = 1,679,234,415.36/54,020.60
  6. Step 6: Final answer
    x = 31,085.08

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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.