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Finding the Fourth Proportional to 67.53, 101.42 and 57.40

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Solution

The fourth proportional to 67.53, 101.42 and 57.40 is: 86.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.53 : 101.42 = 57.40 : x
  2. Step 2: Convert to fraction form
    67.53/101.42 = 57.40/x
  3. Step 3: Cross multiply
    67.53x = 101.42 × 57.40
  4. Step 4: Simplify right side
    67.53x = 5,821.51
  5. Step 5: Solve for x
    x = 5,821.51/67.53
  6. Step 6: Final answer
    x = 86.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.