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Finding the Fourth Proportional to 194.71, 291.78 and 103.13

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Solution

The fourth proportional to 194.71, 291.78 and 103.13 is: 154.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    194.71 : 291.78 = 103.13 : x
  2. Step 2: Convert to fraction form
    194.71/291.78 = 103.13/x
  3. Step 3: Cross multiply
    194.71x = 291.78 × 103.13
  4. Step 4: Simplify right side
    194.71x = 30,091.27
  5. Step 5: Solve for x
    x = 30,091.27/194.71
  6. Step 6: Final answer
    x = 154.54

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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.