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Finding the Fourth Proportional to 117.38, 176.15 and 87.03

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Solution

The fourth proportional to 117.38, 176.15 and 87.03 is: 130.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    117.38 : 176.15 = 87.03 : x
  2. Step 2: Convert to fraction form
    117.38/176.15 = 87.03/x
  3. Step 3: Cross multiply
    117.38x = 176.15 × 87.03
  4. Step 4: Simplify right side
    117.38x = 15,330.33
  5. Step 5: Solve for x
    x = 15,330.33/117.38
  6. Step 6: Final answer
    x = 130.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.