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Finding the Fourth Proportional to 131.49, 181.22 and 98.68

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Solution

The fourth proportional to 131.49, 181.22 and 98.68 is: 136.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    131.49 : 181.22 = 98.68 : x
  2. Step 2: Convert to fraction form
    131.49/181.22 = 98.68/x
  3. Step 3: Cross multiply
    131.49x = 181.22 × 98.68
  4. Step 4: Simplify right side
    131.49x = 17,883.04
  5. Step 5: Solve for x
    x = 17,883.04/131.49
  6. Step 6: Final answer
    x = 136.01

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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.