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Finding the Fourth Proportional to 176.12, 242.51 and 139.16

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Solution

The fourth proportional to 176.12, 242.51 and 139.16 is: 191.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    176.12 : 242.51 = 139.16 : x
  2. Step 2: Convert to fraction form
    176.12/242.51 = 139.16/x
  3. Step 3: Cross multiply
    176.12x = 242.51 × 139.16
  4. Step 4: Simplify right side
    176.12x = 33,747.43
  5. Step 5: Solve for x
    x = 33,747.43/176.12
  6. Step 6: Final answer
    x = 191.62

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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.