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Finding the Fourth Proportional to 98.73, 136.18 and 59.37

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Solution

The fourth proportional to 98.73, 136.18 and 59.37 is: 81.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    98.73 : 136.18 = 59.37 : x
  2. Step 2: Convert to fraction form
    98.73/136.18 = 59.37/x
  3. Step 3: Cross multiply
    98.73x = 136.18 × 59.37
  4. Step 4: Simplify right side
    98.73x = 8,085.01
  5. Step 5: Solve for x
    x = 8,085.01/98.73
  6. Step 6: Final answer
    x = 81.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.