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Finding the Fourth Proportional to 176.86, 243.96 and 103.16

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Solution

The fourth proportional to 176.86, 243.96 and 103.16 is: 142.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    176.86 : 243.96 = 103.16 : x
  2. Step 2: Convert to fraction form
    176.86/243.96 = 103.16/x
  3. Step 3: Cross multiply
    176.86x = 243.96 × 103.16
  4. Step 4: Simplify right side
    176.86x = 25,165.69
  5. Step 5: Solve for x
    x = 25,165.69/176.86
  6. Step 6: Final answer
    x = 142.30

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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.