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Finding the Fourth Proportional to 90.10, 124.17 and 68.23

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Solution

The fourth proportional to 90.10, 124.17 and 68.23 is: 94.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    90.10 : 124.17 = 68.23 : x
  2. Step 2: Convert to fraction form
    90.10/124.17 = 68.23/x
  3. Step 3: Cross multiply
    90.10x = 124.17 × 68.23
  4. Step 4: Simplify right side
    90.10x = 8,471.50
  5. Step 5: Solve for x
    x = 8,471.50/90.10
  6. Step 6: Final answer
    x = 94.03

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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.