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Finding the Fourth Proportional to 94.29, 141.31 and 53.65

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Solution

The fourth proportional to 94.29, 141.31 and 53.65 is: 80.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.29 : 141.31 = 53.65 : x
  2. Step 2: Convert to fraction form
    94.29/141.31 = 53.65/x
  3. Step 3: Cross multiply
    94.29x = 141.31 × 53.65
  4. Step 4: Simplify right side
    94.29x = 7,581.28
  5. Step 5: Solve for x
    x = 7,581.28/94.29
  6. Step 6: Final answer
    x = 80.40

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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.