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Finding the Fourth Proportional to 59.67, 81.77 and 59.31

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Solution

The fourth proportional to 59.67, 81.77 and 59.31 is: 81.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    59.67 : 81.77 = 59.31 : x
  2. Step 2: Convert to fraction form
    59.67/81.77 = 59.31/x
  3. Step 3: Cross multiply
    59.67x = 81.77 × 59.31
  4. Step 4: Simplify right side
    59.67x = 4,849.48
  5. Step 5: Solve for x
    x = 4,849.48/59.67
  6. Step 6: Final answer
    x = 81.27

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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.