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Finding the Fourth Proportional to 55.39, 76.50 and 49.93

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Solution

The fourth proportional to 55.39, 76.50 and 49.93 is: 68.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.39 : 76.50 = 49.93 : x
  2. Step 2: Convert to fraction form
    55.39/76.50 = 49.93/x
  3. Step 3: Cross multiply
    55.39x = 76.50 × 49.93
  4. Step 4: Simplify right side
    55.39x = 3,819.65
  5. Step 5: Solve for x
    x = 3,819.65/55.39
  6. Step 6: Final answer
    x = 68.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.