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Finding the Fourth Proportional to 96.94, 133.86 and 72.49

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Solution

The fourth proportional to 96.94, 133.86 and 72.49 is: 100.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    96.94 : 133.86 = 72.49 : x
  2. Step 2: Convert to fraction form
    96.94/133.86 = 72.49/x
  3. Step 3: Cross multiply
    96.94x = 133.86 × 72.49
  4. Step 4: Simplify right side
    96.94x = 9,703.51
  5. Step 5: Solve for x
    x = 9,703.51/96.94
  6. Step 6: Final answer
    x = 100.10

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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.