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Finding the Fourth Proportional to 120.59, 179.54 and 119.98

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Solution

The fourth proportional to 120.59, 179.54 and 119.98 is: 178.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    120.59 : 179.54 = 119.98 : x
  2. Step 2: Convert to fraction form
    120.59/179.54 = 119.98/x
  3. Step 3: Cross multiply
    120.59x = 179.54 × 119.98
  4. Step 4: Simplify right side
    120.59x = 21,541.62
  5. Step 5: Solve for x
    x = 21,541.62/120.59
  6. Step 6: Final answer
    x = 178.64

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.