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Finding the Fourth Proportional to 156.85, 236.49 and 136.47

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Solution

The fourth proportional to 156.85, 236.49 and 136.47 is: 205.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.85 : 236.49 = 136.47 : x
  2. Step 2: Convert to fraction form
    156.85/236.49 = 136.47/x
  3. Step 3: Cross multiply
    156.85x = 236.49 × 136.47
  4. Step 4: Simplify right side
    156.85x = 32,271.93
  5. Step 5: Solve for x
    x = 32,271.93/156.85
  6. Step 6: Final answer
    x = 205.75

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.