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Finding the Fourth Proportional to 113.22, 156.26 and 69.59

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Solution

The fourth proportional to 113.22, 156.26 and 69.59 is: 96.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.22 : 156.26 = 69.59 : x
  2. Step 2: Convert to fraction form
    113.22/156.26 = 69.59/x
  3. Step 3: Cross multiply
    113.22x = 156.26 × 69.59
  4. Step 4: Simplify right side
    113.22x = 10,874.70
  5. Step 5: Solve for x
    x = 10,874.70/113.22
  6. Step 6: Final answer
    x = 96.05

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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.