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Finding the Fourth Proportional to 156.79, 235.19 and 122.47

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Solution

The fourth proportional to 156.79, 235.19 and 122.47 is: 183.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.79 : 235.19 = 122.47 : x
  2. Step 2: Convert to fraction form
    156.79/235.19 = 122.47/x
  3. Step 3: Cross multiply
    156.79x = 235.19 × 122.47
  4. Step 4: Simplify right side
    156.79x = 28,803.72
  5. Step 5: Solve for x
    x = 28,803.72/156.79
  6. Step 6: Final answer
    x = 183.71

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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.