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Finding the Fourth Proportional to 94.05, 140.86 and 91.02

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Solution

The fourth proportional to 94.05, 140.86 and 91.02 is: 136.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.05 : 140.86 = 91.02 : x
  2. Step 2: Convert to fraction form
    94.05/140.86 = 91.02/x
  3. Step 3: Cross multiply
    94.05x = 140.86 × 91.02
  4. Step 4: Simplify right side
    94.05x = 12,821.08
  5. Step 5: Solve for x
    x = 12,821.08/94.05
  6. Step 6: Final answer
    x = 136.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.