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Finding the Fourth Proportional to 131.03, 179.82 and 118.72

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Solution

The fourth proportional to 131.03, 179.82 and 118.72 is: 162.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    131.03 : 179.82 = 118.72 : x
  2. Step 2: Convert to fraction form
    131.03/179.82 = 118.72/x
  3. Step 3: Cross multiply
    131.03x = 179.82 × 118.72
  4. Step 4: Simplify right side
    131.03x = 21,348.23
  5. Step 5: Solve for x
    x = 21,348.23/131.03
  6. Step 6: Final answer
    x = 162.93

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.