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Finding the Fourth Proportional to 56.77, 78.17 and 49.83

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Solution

The fourth proportional to 56.77, 78.17 and 49.83 is: 68.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    56.77 : 78.17 = 49.83 : x
  2. Step 2: Convert to fraction form
    56.77/78.17 = 49.83/x
  3. Step 3: Cross multiply
    56.77x = 78.17 × 49.83
  4. Step 4: Simplify right side
    56.77x = 3,894.86
  5. Step 5: Solve for x
    x = 3,894.86/56.77
  6. Step 6: Final answer
    x = 68.61

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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.