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Finding the Fourth Proportional to 66.91, 99.94 and 60.48

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Solution

The fourth proportional to 66.91, 99.94 and 60.48 is: 90.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    66.91 : 99.94 = 60.48 : x
  2. Step 2: Convert to fraction form
    66.91/99.94 = 60.48/x
  3. Step 3: Cross multiply
    66.91x = 99.94 × 60.48
  4. Step 4: Simplify right side
    66.91x = 6,044.37
  5. Step 5: Solve for x
    x = 6,044.37/66.91
  6. Step 6: Final answer
    x = 90.34

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.