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Finding the Fourth Proportional to 97.58, 134.49 and 72.98

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Solution

The fourth proportional to 97.58, 134.49 and 72.98 is: 100.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    97.58 : 134.49 = 72.98 : x
  2. Step 2: Convert to fraction form
    97.58/134.49 = 72.98/x
  3. Step 3: Cross multiply
    97.58x = 134.49 × 72.98
  4. Step 4: Simplify right side
    97.58x = 9,815.19
  5. Step 5: Solve for x
    x = 9,815.19/97.58
  6. Step 6: Final answer
    x = 100.58

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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.