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Finding the Fourth Proportional to 119.80, 179.55 and 65.74

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Solution

The fourth proportional to 119.80, 179.55 and 65.74 is: 98.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.80 : 179.55 = 65.74 : x
  2. Step 2: Convert to fraction form
    119.80/179.55 = 65.74/x
  3. Step 3: Cross multiply
    119.80x = 179.55 × 65.74
  4. Step 4: Simplify right side
    119.80x = 11,803.62
  5. Step 5: Solve for x
    x = 11,803.62/119.80
  6. Step 6: Final answer
    x = 98.53

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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.