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Finding the Fourth Proportional to 67.09, 100.06 and 61.24

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Solution

The fourth proportional to 67.09, 100.06 and 61.24 is: 91.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.09 : 100.06 = 61.24 : x
  2. Step 2: Convert to fraction form
    67.09/100.06 = 61.24/x
  3. Step 3: Cross multiply
    67.09x = 100.06 × 61.24
  4. Step 4: Simplify right side
    67.09x = 6,127.17
  5. Step 5: Solve for x
    x = 6,127.17/67.09
  6. Step 6: Final answer
    x = 91.33

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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.