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Finding the Fourth Proportional to 156.92, 235.45 and 84.69

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Solution

The fourth proportional to 156.92, 235.45 and 84.69 is: 127.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.92 : 235.45 = 84.69 : x
  2. Step 2: Convert to fraction form
    156.92/235.45 = 84.69/x
  3. Step 3: Cross multiply
    156.92x = 235.45 × 84.69
  4. Step 4: Simplify right side
    156.92x = 19,940.93
  5. Step 5: Solve for x
    x = 19,940.93/156.92
  6. Step 6: Final answer
    x = 127.08

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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.