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Finding the Fourth Proportional to 71.18, 106.08 and 57.41

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Solution

The fourth proportional to 71.18, 106.08 and 57.41 is: 85.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    71.18 : 106.08 = 57.41 : x
  2. Step 2: Convert to fraction form
    71.18/106.08 = 57.41/x
  3. Step 3: Cross multiply
    71.18x = 106.08 × 57.41
  4. Step 4: Simplify right side
    71.18x = 6,090.19
  5. Step 5: Solve for x
    x = 6,090.19/71.18
  6. Step 6: Final answer
    x = 85.56

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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.