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Finding the Fourth Proportional to 67.90, 93.75 and 48.50

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Solution

The fourth proportional to 67.90, 93.75 and 48.50 is: 66.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.90 : 93.75 = 48.50 : x
  2. Step 2: Convert to fraction form
    67.90/93.75 = 48.50/x
  3. Step 3: Cross multiply
    67.90x = 93.75 × 48.50
  4. Step 4: Simplify right side
    67.90x = 4,546.88
  5. Step 5: Solve for x
    x = 4,546.88/67.90
  6. Step 6: Final answer
    x = 66.97

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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.