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Finding the Fourth Proportional to 98.05, 146.21 and 92.66

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Solution

The fourth proportional to 98.05, 146.21 and 92.66 is: 138.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    98.05 : 146.21 = 92.66 : x
  2. Step 2: Convert to fraction form
    98.05/146.21 = 92.66/x
  3. Step 3: Cross multiply
    98.05x = 146.21 × 92.66
  4. Step 4: Simplify right side
    98.05x = 13,547.32
  5. Step 5: Solve for x
    x = 13,547.32/98.05
  6. Step 6: Final answer
    x = 138.17

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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.