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Finding the Fourth Proportional to 156.04, 233.76 and 121.79

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Solution

The fourth proportional to 156.04, 233.76 and 121.79 is: 182.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.04 : 233.76 = 121.79 : x
  2. Step 2: Convert to fraction form
    156.04/233.76 = 121.79/x
  3. Step 3: Cross multiply
    156.04x = 233.76 × 121.79
  4. Step 4: Simplify right side
    156.04x = 28,469.63
  5. Step 5: Solve for x
    x = 28,469.63/156.04
  6. Step 6: Final answer
    x = 182.45

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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.