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Finding the Fourth Proportional to 98, 146.71 and 67.50

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Solution

The fourth proportional to 98, 146.71 and 67.50 is: 101.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    98 : 146.71 = 67.50 : x
  2. Step 2: Convert to fraction form
    98/146.71 = 67.50/x
  3. Step 3: Cross multiply
    98x = 146.71 × 67.50
  4. Step 4: Simplify right side
    98x = 9,902.93
  5. Step 5: Solve for x
    x = 9,902.93/98
  6. Step 6: Final answer
    x = 101.05

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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.