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Finding the Fourth Proportional to 67.04, 100.57 and 30.98

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Solution

The fourth proportional to 67.04, 100.57 and 30.98 is: 46.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.04 : 100.57 = 30.98 : x
  2. Step 2: Convert to fraction form
    67.04/100.57 = 30.98/x
  3. Step 3: Cross multiply
    67.04x = 100.57 × 30.98
  4. Step 4: Simplify right side
    67.04x = 3,115.66
  5. Step 5: Solve for x
    x = 3,115.66/67.04
  6. Step 6: Final answer
    x = 46.47

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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.