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Finding the Fourth Proportional to 60.90, 84.03 and 34.68

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Solution

The fourth proportional to 60.90, 84.03 and 34.68 is: 47.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    60.90 : 84.03 = 34.68 : x
  2. Step 2: Convert to fraction form
    60.90/84.03 = 34.68/x
  3. Step 3: Cross multiply
    60.90x = 84.03 × 34.68
  4. Step 4: Simplify right side
    60.90x = 2,914.16
  5. Step 5: Solve for x
    x = 2,914.16/60.90
  6. Step 6: Final answer
    x = 47.85

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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.