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Finding the Fourth Proportional to 105.57, 157.64 and 94.23

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Solution

The fourth proportional to 105.57, 157.64 and 94.23 is: 140.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    105.57 : 157.64 = 94.23 : x
  2. Step 2: Convert to fraction form
    105.57/157.64 = 94.23/x
  3. Step 3: Cross multiply
    105.57x = 157.64 × 94.23
  4. Step 4: Simplify right side
    105.57x = 14,853.95
  5. Step 5: Solve for x
    x = 14,853.95/105.57
  6. Step 6: Final answer
    x = 140.70

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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.