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Finding the Fourth Proportional to 156.78, 234.63 and 117.63

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Solution

The fourth proportional to 156.78, 234.63 and 117.63 is: 176.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.78 : 234.63 = 117.63 : x
  2. Step 2: Convert to fraction form
    156.78/234.63 = 117.63/x
  3. Step 3: Cross multiply
    156.78x = 234.63 × 117.63
  4. Step 4: Simplify right side
    156.78x = 27,599.53
  5. Step 5: Solve for x
    x = 27,599.53/156.78
  6. Step 6: Final answer
    x = 176.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.