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Finding the Fourth Proportional to 66.14, 91.15 and 57.37

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Solution

The fourth proportional to 66.14, 91.15 and 57.37 is: 79.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    66.14 : 91.15 = 57.37 : x
  2. Step 2: Convert to fraction form
    66.14/91.15 = 57.37/x
  3. Step 3: Cross multiply
    66.14x = 91.15 × 57.37
  4. Step 4: Simplify right side
    66.14x = 5,229.28
  5. Step 5: Solve for x
    x = 5,229.28/66.14
  6. Step 6: Final answer
    x = 79.06

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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.