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Finding the Fourth Proportional to 54,471.80, 81,707.70 and 45,723.80

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Solution

The fourth proportional to 54,471.80, 81,707.70 and 45,723.80 is: 68,585.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,471.80 : 81,707.70 = 45,723.80 : x
  2. Step 2: Convert to fraction form
    54,471.80/81,707.70 = 45,723.80/x
  3. Step 3: Cross multiply
    54,471.80x = 81,707.70 × 45,723.80
  4. Step 4: Simplify right side
    54,471.80x = 3,735,986,533.26
  5. Step 5: Solve for x
    x = 3,735,986,533.26/54,471.80
  6. Step 6: Final answer
    x = 68,585.70

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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.