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Finding the Fourth Proportional to 88.05, 131.30 and 77.27

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Solution

The fourth proportional to 88.05, 131.30 and 77.27 is: 115.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.05 : 131.30 = 77.27 : x
  2. Step 2: Convert to fraction form
    88.05/131.30 = 77.27/x
  3. Step 3: Cross multiply
    88.05x = 131.30 × 77.27
  4. Step 4: Simplify right side
    88.05x = 10,145.09
  5. Step 5: Solve for x
    x = 10,145.09/88.05
  6. Step 6: Final answer
    x = 115.22

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.