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Finding the Fourth Proportional to 251.16, 346.59 and 139.13

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Solution

The fourth proportional to 251.16, 346.59 and 139.13 is: 191.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.16 : 346.59 = 139.13 : x
  2. Step 2: Convert to fraction form
    251.16/346.59 = 139.13/x
  3. Step 3: Cross multiply
    251.16x = 346.59 × 139.13
  4. Step 4: Simplify right side
    251.16x = 48,221.07
  5. Step 5: Solve for x
    x = 48,221.07/251.16
  6. Step 6: Final answer
    x = 191.99

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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.