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Finding the Fourth Proportional to 98.73, 148.08 and 58.11

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Solution

The fourth proportional to 98.73, 148.08 and 58.11 is: 87.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    98.73 : 148.08 = 58.11 : x
  2. Step 2: Convert to fraction form
    98.73/148.08 = 58.11/x
  3. Step 3: Cross multiply
    98.73x = 148.08 × 58.11
  4. Step 4: Simplify right side
    98.73x = 8,604.93
  5. Step 5: Solve for x
    x = 8,604.93/98.73
  6. Step 6: Final answer
    x = 87.16

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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.