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Finding the Fourth Proportional to 96.58, 133.28 and 74.47

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Solution

The fourth proportional to 96.58, 133.28 and 74.47 is: 102.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    96.58 : 133.28 = 74.47 : x
  2. Step 2: Convert to fraction form
    96.58/133.28 = 74.47/x
  3. Step 3: Cross multiply
    96.58x = 133.28 × 74.47
  4. Step 4: Simplify right side
    96.58x = 9,925.19
  5. Step 5: Solve for x
    x = 9,925.19/96.58
  6. Step 6: Final answer
    x = 102.77

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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.