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Finding the Fourth Proportional to 96.88, 133.62 and 74.98

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Solution

The fourth proportional to 96.88, 133.62 and 74.98 is: 103.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    96.88 : 133.62 = 74.98 : x
  2. Step 2: Convert to fraction form
    96.88/133.62 = 74.98/x
  3. Step 3: Cross multiply
    96.88x = 133.62 × 74.98
  4. Step 4: Simplify right side
    96.88x = 10,018.83
  5. Step 5: Solve for x
    x = 10,018.83/96.88
  6. Step 6: Final answer
    x = 103.41

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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.