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Finding the Fourth Proportional to 94.26, 130.12 and 72.13

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Solution

The fourth proportional to 94.26, 130.12 and 72.13 is: 99.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.26 : 130.12 = 72.13 : x
  2. Step 2: Convert to fraction form
    94.26/130.12 = 72.13/x
  3. Step 3: Cross multiply
    94.26x = 130.12 × 72.13
  4. Step 4: Simplify right side
    94.26x = 9,385.56
  5. Step 5: Solve for x
    x = 9,385.56/94.26
  6. Step 6: Final answer
    x = 99.57

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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.