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Finding the Fourth Proportional to 176.15, 243.05 and 102.45

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Solution

The fourth proportional to 176.15, 243.05 and 102.45 is: 141.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    176.15 : 243.05 = 102.45 : x
  2. Step 2: Convert to fraction form
    176.15/243.05 = 102.45/x
  3. Step 3: Cross multiply
    176.15x = 243.05 × 102.45
  4. Step 4: Simplify right side
    176.15x = 24,899.96
  5. Step 5: Solve for x
    x = 24,899.96/176.15
  6. Step 6: Final answer
    x = 141.36

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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.