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Finding the Fourth Proportional to 156.86, 234.23 and 147.86

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Solution

The fourth proportional to 156.86, 234.23 and 147.86 is: 220.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.86 : 234.23 = 147.86 : x
  2. Step 2: Convert to fraction form
    156.86/234.23 = 147.86/x
  3. Step 3: Cross multiply
    156.86x = 234.23 × 147.86
  4. Step 4: Simplify right side
    156.86x = 34,633.25
  5. Step 5: Solve for x
    x = 34,633.25/156.86
  6. Step 6: Final answer
    x = 220.79

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.