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Finding the Fourth Proportional to 154.61, 231.59 and 105.59

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Solution

The fourth proportional to 154.61, 231.59 and 105.59 is: 158.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    154.61 : 231.59 = 105.59 : x
  2. Step 2: Convert to fraction form
    154.61/231.59 = 105.59/x
  3. Step 3: Cross multiply
    154.61x = 231.59 × 105.59
  4. Step 4: Simplify right side
    154.61x = 24,453.59
  5. Step 5: Solve for x
    x = 24,453.59/154.61
  6. Step 6: Final answer
    x = 158.16

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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.