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Finding the Fourth Proportional to 98.79, 137.27 and 97.49

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Solution

The fourth proportional to 98.79, 137.27 and 97.49 is: 135.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    98.79 : 137.27 = 97.49 : x
  2. Step 2: Convert to fraction form
    98.79/137.27 = 97.49/x
  3. Step 3: Cross multiply
    98.79x = 137.27 × 97.49
  4. Step 4: Simplify right side
    98.79x = 13,381.28
  5. Step 5: Solve for x
    x = 13,381.28/98.79
  6. Step 6: Final answer
    x = 135.45

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.