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Finding the Fourth Proportional to 116.26, 160.40 and 72.56

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Solution

The fourth proportional to 116.26, 160.40 and 72.56 is: 100.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    116.26 : 160.40 = 72.56 : x
  2. Step 2: Convert to fraction form
    116.26/160.40 = 72.56/x
  3. Step 3: Cross multiply
    116.26x = 160.40 × 72.56
  4. Step 4: Simplify right side
    116.26x = 11,639.21
  5. Step 5: Solve for x
    x = 11,639.21/116.26
  6. Step 6: Final answer
    x = 100.12

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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.