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Finding the Fourth Proportional to 94.57, 130.57 and 71.31

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Solution

The fourth proportional to 94.57, 130.57 and 71.31 is: 98.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.57 : 130.57 = 71.31 : x
  2. Step 2: Convert to fraction form
    94.57/130.57 = 71.31/x
  3. Step 3: Cross multiply
    94.57x = 130.57 × 71.31
  4. Step 4: Simplify right side
    94.57x = 9,310.95
  5. Step 5: Solve for x
    x = 9,310.95/94.57
  6. Step 6: Final answer
    x = 98.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.