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Finding the Fourth Proportional to 119.07, 177.21 and 115.18

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Solution

The fourth proportional to 119.07, 177.21 and 115.18 is: 171.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.07 : 177.21 = 115.18 : x
  2. Step 2: Convert to fraction form
    119.07/177.21 = 115.18/x
  3. Step 3: Cross multiply
    119.07x = 177.21 × 115.18
  4. Step 4: Simplify right side
    119.07x = 20,411.05
  5. Step 5: Solve for x
    x = 20,411.05/119.07
  6. Step 6: Final answer
    x = 171.42

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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.