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Finding the Fourth Proportional to 131.32, 196.87 and 102.28

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Solution

The fourth proportional to 131.32, 196.87 and 102.28 is: 153.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    131.32 : 196.87 = 102.28 : x
  2. Step 2: Convert to fraction form
    131.32/196.87 = 102.28/x
  3. Step 3: Cross multiply
    131.32x = 196.87 × 102.28
  4. Step 4: Simplify right side
    131.32x = 20,134.37
  5. Step 5: Solve for x
    x = 20,134.37/131.32
  6. Step 6: Final answer
    x = 153.32

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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.