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Finding the Fourth Proportional to 67.83, 93.68 and 55.68

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Solution

The fourth proportional to 67.83, 93.68 and 55.68 is: 76.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.83 : 93.68 = 55.68 : x
  2. Step 2: Convert to fraction form
    67.83/93.68 = 55.68/x
  3. Step 3: Cross multiply
    67.83x = 93.68 × 55.68
  4. Step 4: Simplify right side
    67.83x = 5,216.10
  5. Step 5: Solve for x
    x = 5,216.10/67.83
  6. Step 6: Final answer
    x = 76.90

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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.