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Finding the Fourth Proportional to 77.33, 105.88 and 77.06

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Solution

The fourth proportional to 77.33, 105.88 and 77.06 is: 105.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    77.33 : 105.88 = 77.06 : x
  2. Step 2: Convert to fraction form
    77.33/105.88 = 77.06/x
  3. Step 3: Cross multiply
    77.33x = 105.88 × 77.06
  4. Step 4: Simplify right side
    77.33x = 8,159.11
  5. Step 5: Solve for x
    x = 8,159.11/77.33
  6. Step 6: Final answer
    x = 105.51

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.