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Finding the Fourth Proportional to 77.68, 107.17 and 46.59

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Solution

The fourth proportional to 77.68, 107.17 and 46.59 is: 64.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    77.68 : 107.17 = 46.59 : x
  2. Step 2: Convert to fraction form
    77.68/107.17 = 46.59/x
  3. Step 3: Cross multiply
    77.68x = 107.17 × 46.59
  4. Step 4: Simplify right side
    77.68x = 4,993.05
  5. Step 5: Solve for x
    x = 4,993.05/77.68
  6. Step 6: Final answer
    x = 64.28

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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.