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Finding the Fourth Proportional to 54,191.88, 74,785.08 and 30,318.54

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Solution

The fourth proportional to 54,191.88, 74,785.08 and 30,318.54 is: 41,839.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,191.88 : 74,785.08 = 30,318.54 : x
  2. Step 2: Convert to fraction form
    54,191.88/74,785.08 = 30,318.54/x
  3. Step 3: Cross multiply
    54,191.88x = 74,785.08 × 30,318.54
  4. Step 4: Simplify right side
    54,191.88x = 2,267,374,439.38
  5. Step 5: Solve for x
    x = 2,267,374,439.38/54,191.88
  6. Step 6: Final answer
    x = 41,839.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.