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Finding the Fourth Proportional to 139.91, 192.76 and 127.62

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Solution

The fourth proportional to 139.91, 192.76 and 127.62 is: 175.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    139.91 : 192.76 = 127.62 : x
  2. Step 2: Convert to fraction form
    139.91/192.76 = 127.62/x
  3. Step 3: Cross multiply
    139.91x = 192.76 × 127.62
  4. Step 4: Simplify right side
    139.91x = 24,599.71
  5. Step 5: Solve for x
    x = 24,599.71/139.91
  6. Step 6: Final answer
    x = 175.83

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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.