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Finding the Fourth Proportional to 94.36, 141.66 and 87.16

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Solution

The fourth proportional to 94.36, 141.66 and 87.16 is: 130.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.36 : 141.66 = 87.16 : x
  2. Step 2: Convert to fraction form
    94.36/141.66 = 87.16/x
  3. Step 3: Cross multiply
    94.36x = 141.66 × 87.16
  4. Step 4: Simplify right side
    94.36x = 12,347.09
  5. Step 5: Solve for x
    x = 12,347.09/94.36
  6. Step 6: Final answer
    x = 130.85

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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.