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Finding the Fourth Proportional to 119.53, 179.30 and 79

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Solution

The fourth proportional to 119.53, 179.30 and 79 is: 118.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.53 : 179.30 = 79 : x
  2. Step 2: Convert to fraction form
    119.53/179.30 = 79/x
  3. Step 3: Cross multiply
    119.53x = 179.30 × 79
  4. Step 4: Simplify right side
    119.53x = 14,164.70
  5. Step 5: Solve for x
    x = 14,164.70/119.53
  6. Step 6: Final answer
    x = 118.50

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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.