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Finding the Fourth Proportional to 60.12, 90.17 and 18.99

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Solution

The fourth proportional to 60.12, 90.17 and 18.99 is: 28.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    60.12 : 90.17 = 18.99 : x
  2. Step 2: Convert to fraction form
    60.12/90.17 = 18.99/x
  3. Step 3: Cross multiply
    60.12x = 90.17 × 18.99
  4. Step 4: Simplify right side
    60.12x = 1,712.33
  5. Step 5: Solve for x
    x = 1,712.33/60.12
  6. Step 6: Final answer
    x = 28.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.