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Finding the Fourth Proportional to 54,018.67, 80,972.62 and 20,729.80

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Solution

The fourth proportional to 54,018.67, 80,972.62 and 20,729.80 is: 31,073.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,018.67 : 80,972.62 = 20,729.80 : x
  2. Step 2: Convert to fraction form
    54,018.67/80,972.62 = 20,729.80/x
  3. Step 3: Cross multiply
    54,018.67x = 80,972.62 × 20,729.80
  4. Step 4: Simplify right side
    54,018.67x = 1,678,546,218.08
  5. Step 5: Solve for x
    x = 1,678,546,218.08/54,018.67
  6. Step 6: Final answer
    x = 31,073.45

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1.5x scale

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.