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Finding the Fourth Proportional to 128.82, 177.52 and 119.01

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Solution

The fourth proportional to 128.82, 177.52 and 119.01 is: 164.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    128.82 : 177.52 = 119.01 : x
  2. Step 2: Convert to fraction form
    128.82/177.52 = 119.01/x
  3. Step 3: Cross multiply
    128.82x = 177.52 × 119.01
  4. Step 4: Simplify right side
    128.82x = 21,126.66
  5. Step 5: Solve for x
    x = 21,126.66/128.82
  6. Step 6: Final answer
    x = 164.00

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.