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Finding the Fourth Proportional to 67.39, 100.98 and 40.36

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Solution

The fourth proportional to 67.39, 100.98 and 40.36 is: 60.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.39 : 100.98 = 40.36 : x
  2. Step 2: Convert to fraction form
    67.39/100.98 = 40.36/x
  3. Step 3: Cross multiply
    67.39x = 100.98 × 40.36
  4. Step 4: Simplify right side
    67.39x = 4,075.55
  5. Step 5: Solve for x
    x = 4,075.55/67.39
  6. Step 6: Final answer
    x = 60.48

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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.