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Finding the Fourth Proportional to 118,480.20, 177,288.30 and 87,376.20

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Solution

The fourth proportional to 118,480.20, 177,288.30 and 87,376.20 is: 130,745.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,480.20 : 177,288.30 = 87,376.20 : x
  2. Step 2: Convert to fraction form
    118,480.20/177,288.30 = 87,376.20/x
  3. Step 3: Cross multiply
    118,480.20x = 177,288.30 × 87,376.20
  4. Step 4: Simplify right side
    118,480.20x = 15,490,777,958.46
  5. Step 5: Solve for x
    x = 15,490,777,958.46/118,480.20
  6. Step 6: Final answer
    x = 130,745.71

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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.