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Finding the Fourth Proportional to 54,381.40, 81,572.10 and 40,557.40

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Solution

The fourth proportional to 54,381.40, 81,572.10 and 40,557.40 is: 60,836.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,381.40 : 81,572.10 = 40,557.40 : x
  2. Step 2: Convert to fraction form
    54,381.40/81,572.10 = 40,557.40/x
  3. Step 3: Cross multiply
    54,381.40x = 81,572.10 × 40,557.40
  4. Step 4: Simplify right side
    54,381.40x = 3,308,352,288.54
  5. Step 5: Solve for x
    x = 3,308,352,288.54/54,381.40
  6. Step 6: Final answer
    x = 60,836.10

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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.