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Finding the Fourth Proportional to 185.95, 278.38 and 117.55

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Solution

The fourth proportional to 185.95, 278.38 and 117.55 is: 175.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.95 : 278.38 = 117.55 : x
  2. Step 2: Convert to fraction form
    185.95/278.38 = 117.55/x
  3. Step 3: Cross multiply
    185.95x = 278.38 × 117.55
  4. Step 4: Simplify right side
    185.95x = 32,723.57
  5. Step 5: Solve for x
    x = 32,723.57/185.95
  6. Step 6: Final answer
    x = 175.98

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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.