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Finding the Fourth Proportional to 94.15, 141.10 and 42.79

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Solution

The fourth proportional to 94.15, 141.10 and 42.79 is: 64.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.15 : 141.10 = 42.79 : x
  2. Step 2: Convert to fraction form
    94.15/141.10 = 42.79/x
  3. Step 3: Cross multiply
    94.15x = 141.10 × 42.79
  4. Step 4: Simplify right side
    94.15x = 6,037.67
  5. Step 5: Solve for x
    x = 6,037.67/94.15
  6. Step 6: Final answer
    x = 64.13

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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.