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Finding the Fourth Proportional to 123.91, 185.86 and 46.89

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Solution

The fourth proportional to 123.91, 185.86 and 46.89 is: 70.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    123.91 : 185.86 = 46.89 : x
  2. Step 2: Convert to fraction form
    123.91/185.86 = 46.89/x
  3. Step 3: Cross multiply
    123.91x = 185.86 × 46.89
  4. Step 4: Simplify right side
    123.91x = 8,714.98
  5. Step 5: Solve for x
    x = 8,714.98/123.91
  6. Step 6: Final answer
    x = 70.33

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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.