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Finding the Fourth Proportional to 94.79, 142.18 and 30.66

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Solution

The fourth proportional to 94.79, 142.18 and 30.66 is: 45.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.79 : 142.18 = 30.66 : x
  2. Step 2: Convert to fraction form
    94.79/142.18 = 30.66/x
  3. Step 3: Cross multiply
    94.79x = 142.18 × 30.66
  4. Step 4: Simplify right side
    94.79x = 4,359.16
  5. Step 5: Solve for x
    x = 4,359.16/94.79
  6. Step 6: Final answer
    x = 45.99

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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.