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Finding the Fourth Proportional to 156.92, 235.07 and 120.67

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Solution

The fourth proportional to 156.92, 235.07 and 120.67 is: 180.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.92 : 235.07 = 120.67 : x
  2. Step 2: Convert to fraction form
    156.92/235.07 = 120.67/x
  3. Step 3: Cross multiply
    156.92x = 235.07 × 120.67
  4. Step 4: Simplify right side
    156.92x = 28,366.20
  5. Step 5: Solve for x
    x = 28,366.20/156.92
  6. Step 6: Final answer
    x = 180.77

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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.