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Finding the Fourth Proportional to 154.74, 232.29 and 86.32

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Solution

The fourth proportional to 154.74, 232.29 and 86.32 is: 129.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.74 : 232.29 = 86.32 : x
  2. Step 2: Convert to fraction form
    154.74/232.29 = 86.32/x
  3. Step 3: Cross multiply
    154.74x = 232.29 × 86.32
  4. Step 4: Simplify right side
    154.74x = 20,051.27
  5. Step 5: Solve for x
    x = 20,051.27/154.74
  6. Step 6: Final answer
    x = 129.58

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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.