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Finding the Fourth Proportional to 131.05, 180.77 and 102.01

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Solution

The fourth proportional to 131.05, 180.77 and 102.01 is: 140.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    131.05 : 180.77 = 102.01 : x
  2. Step 2: Convert to fraction form
    131.05/180.77 = 102.01/x
  3. Step 3: Cross multiply
    131.05x = 180.77 × 102.01
  4. Step 4: Simplify right side
    131.05x = 18,439.84
  5. Step 5: Solve for x
    x = 18,439.84/131.05
  6. Step 6: Final answer
    x = 140.71

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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.