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Finding the Fourth Proportional to 98.77, 149.11 and 98.23

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Solution

The fourth proportional to 98.77, 149.11 and 98.23 is: 148.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    98.77 : 149.11 = 98.23 : x
  2. Step 2: Convert to fraction form
    98.77/149.11 = 98.23/x
  3. Step 3: Cross multiply
    98.77x = 149.11 × 98.23
  4. Step 4: Simplify right side
    98.77x = 14,647.08
  5. Step 5: Solve for x
    x = 14,647.08/98.77
  6. Step 6: Final answer
    x = 148.29

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.