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Finding the Fourth Proportional to 139.46, 192.33 and 117.59

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Solution

The fourth proportional to 139.46, 192.33 and 117.59 is: 162.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.46 : 192.33 = 117.59 : x
  2. Step 2: Convert to fraction form
    139.46/192.33 = 117.59/x
  3. Step 3: Cross multiply
    139.46x = 192.33 × 117.59
  4. Step 4: Simplify right side
    139.46x = 22,616.08
  5. Step 5: Solve for x
    x = 22,616.08/139.46
  6. Step 6: Final answer
    x = 162.17

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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.