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Finding the Fourth Proportional to 113.42, 156.44 and 69.14

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Solution

The fourth proportional to 113.42, 156.44 and 69.14 is: 95.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.42 : 156.44 = 69.14 : x
  2. Step 2: Convert to fraction form
    113.42/156.44 = 69.14/x
  3. Step 3: Cross multiply
    113.42x = 156.44 × 69.14
  4. Step 4: Simplify right side
    113.42x = 10,816.26
  5. Step 5: Solve for x
    x = 10,816.26/113.42
  6. Step 6: Final answer
    x = 95.36

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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.