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Finding the Fourth Proportional to 132.70, 183.16 and 77.48

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Solution

The fourth proportional to 132.70, 183.16 and 77.48 is: 106.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    132.70 : 183.16 = 77.48 : x
  2. Step 2: Convert to fraction form
    132.70/183.16 = 77.48/x
  3. Step 3: Cross multiply
    132.70x = 183.16 × 77.48
  4. Step 4: Simplify right side
    132.70x = 14,191.24
  5. Step 5: Solve for x
    x = 14,191.24/132.70
  6. Step 6: Final answer
    x = 106.94

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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.