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Finding the Fourth Proportional to 59.97, 89.40 and 57.09

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Solution

The fourth proportional to 59.97, 89.40 and 57.09 is: 85.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    59.97 : 89.40 = 57.09 : x
  2. Step 2: Convert to fraction form
    59.97/89.40 = 57.09/x
  3. Step 3: Cross multiply
    59.97x = 89.40 × 57.09
  4. Step 4: Simplify right side
    59.97x = 5,103.85
  5. Step 5: Solve for x
    x = 5,103.85/59.97
  6. Step 6: Final answer
    x = 85.11

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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.