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Finding the Fourth Proportional to 156.26, 215.48 and 134.20

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Solution

The fourth proportional to 156.26, 215.48 and 134.20 is: 185.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.26 : 215.48 = 134.20 : x
  2. Step 2: Convert to fraction form
    156.26/215.48 = 134.20/x
  3. Step 3: Cross multiply
    156.26x = 215.48 × 134.20
  4. Step 4: Simplify right side
    156.26x = 28,917.42
  5. Step 5: Solve for x
    x = 28,917.42/156.26
  6. Step 6: Final answer
    x = 185.06

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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.