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Finding the Fourth Proportional to 118.51, 177.71 and 46.31

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Solution

The fourth proportional to 118.51, 177.71 and 46.31 is: 69.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.51 : 177.71 = 46.31 : x
  2. Step 2: Convert to fraction form
    118.51/177.71 = 46.31/x
  3. Step 3: Cross multiply
    118.51x = 177.71 × 46.31
  4. Step 4: Simplify right side
    118.51x = 8,229.96
  5. Step 5: Solve for x
    x = 8,229.96/118.51
  6. Step 6: Final answer
    x = 69.45

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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.