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Finding the Fourth Proportional to 127.64, 177.02 and 119.72

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Solution

The fourth proportional to 127.64, 177.02 and 119.72 is: 166.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.64 : 177.02 = 119.72 : x
  2. Step 2: Convert to fraction form
    127.64/177.02 = 119.72/x
  3. Step 3: Cross multiply
    127.64x = 177.02 × 119.72
  4. Step 4: Simplify right side
    127.64x = 21,192.83
  5. Step 5: Solve for x
    x = 21,192.83/127.64
  6. Step 6: Final answer
    x = 166.04

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.