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Finding the Fourth Proportional to 131.12, 180.13 and 106.48

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Solution

The fourth proportional to 131.12, 180.13 and 106.48 is: 146.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    131.12 : 180.13 = 106.48 : x
  2. Step 2: Convert to fraction form
    131.12/180.13 = 106.48/x
  3. Step 3: Cross multiply
    131.12x = 180.13 × 106.48
  4. Step 4: Simplify right side
    131.12x = 19,180.70
  5. Step 5: Solve for x
    x = 19,180.70/131.12
  6. Step 6: Final answer
    x = 146.28

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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.