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Finding the Fourth Proportional to 194.78, 292.08 and 103.45

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Solution

The fourth proportional to 194.78, 292.08 and 103.45 is: 155.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    194.78 : 292.08 = 103.45 : x
  2. Step 2: Convert to fraction form
    194.78/292.08 = 103.45/x
  3. Step 3: Cross multiply
    194.78x = 292.08 × 103.45
  4. Step 4: Simplify right side
    194.78x = 30,216.59
  5. Step 5: Solve for x
    x = 30,216.59/194.78
  6. Step 6: Final answer
    x = 155.13

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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.