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Finding the Fourth Proportional to 54,108.70, 81,163.05 and 40,986.70

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Solution

The fourth proportional to 54,108.70, 81,163.05 and 40,986.70 is: 61,480.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,108.70 : 81,163.05 = 40,986.70 : x
  2. Step 2: Convert to fraction form
    54,108.70/81,163.05 = 40,986.70/x
  3. Step 3: Cross multiply
    54,108.70x = 81,163.05 × 40,986.70
  4. Step 4: Simplify right side
    54,108.70x = 3,326,605,581.44
  5. Step 5: Solve for x
    x = 3,326,605,581.44/54,108.70
  6. Step 6: Final answer
    x = 61,480.05

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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.