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Finding the Fourth Proportional to 67.45, 101.01 and 40.31

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Solution

The fourth proportional to 67.45, 101.01 and 40.31 is: 60.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.45 : 101.01 = 40.31 : x
  2. Step 2: Convert to fraction form
    67.45/101.01 = 40.31/x
  3. Step 3: Cross multiply
    67.45x = 101.01 × 40.31
  4. Step 4: Simplify right side
    67.45x = 4,071.71
  5. Step 5: Solve for x
    x = 4,071.71/67.45
  6. Step 6: Final answer
    x = 60.37

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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.