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Finding the Fourth Proportional to 94.49, 139.80 and 94.22

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Solution

The fourth proportional to 94.49, 139.80 and 94.22 is: 139.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.49 : 139.80 = 94.22 : x
  2. Step 2: Convert to fraction form
    94.49/139.80 = 94.22/x
  3. Step 3: Cross multiply
    94.49x = 139.80 × 94.22
  4. Step 4: Simplify right side
    94.49x = 13,171.26
  5. Step 5: Solve for x
    x = 13,171.26/94.49
  6. Step 6: Final answer
    x = 139.40

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.