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Finding the Fourth Proportional to 67.93, 93.75 and 40.30

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Solution

The fourth proportional to 67.93, 93.75 and 40.30 is: 55.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.93 : 93.75 = 40.30 : x
  2. Step 2: Convert to fraction form
    67.93/93.75 = 40.30/x
  3. Step 3: Cross multiply
    67.93x = 93.75 × 40.30
  4. Step 4: Simplify right side
    67.93x = 3,777.89
  5. Step 5: Solve for x
    x = 3,777.89/67.93
  6. Step 6: Final answer
    x = 55.61

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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.