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Finding the Fourth Proportional to 67.58, 93.34 and 55.45

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Solution

The fourth proportional to 67.58, 93.34 and 55.45 is: 76.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.58 : 93.34 = 55.45 : x
  2. Step 2: Convert to fraction form
    67.58/93.34 = 55.45/x
  3. Step 3: Cross multiply
    67.58x = 93.34 × 55.45
  4. Step 4: Simplify right side
    67.58x = 5,175.24
  5. Step 5: Solve for x
    x = 5,175.24/67.58
  6. Step 6: Final answer
    x = 76.59

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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.