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Finding the Fourth Proportional to 139.33, 192.25 and 84.07

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Solution

The fourth proportional to 139.33, 192.25 and 84.07 is: 116.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.33 : 192.25 = 84.07 : x
  2. Step 2: Convert to fraction form
    139.33/192.25 = 84.07/x
  3. Step 3: Cross multiply
    139.33x = 192.25 × 84.07
  4. Step 4: Simplify right side
    139.33x = 16,162.25
  5. Step 5: Solve for x
    x = 16,162.25/139.33
  6. Step 6: Final answer
    x = 116.00

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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.