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Finding the Fourth Proportional to 94.09, 141.97 and 91.06

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Solution

The fourth proportional to 94.09, 141.97 and 91.06 is: 137.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.09 : 141.97 = 91.06 : x
  2. Step 2: Convert to fraction form
    94.09/141.97 = 91.06/x
  3. Step 3: Cross multiply
    94.09x = 141.97 × 91.06
  4. Step 4: Simplify right side
    94.09x = 12,927.79
  5. Step 5: Solve for x
    x = 12,927.79/94.09
  6. Step 6: Final answer
    x = 137.40

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.