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Finding the Fourth Proportional to 118,475.20, 177,280.80 and 87,371.20

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Solution

The fourth proportional to 118,475.20, 177,280.80 and 87,371.20 is: 130,738.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,475.20 : 177,280.80 = 87,371.20 : x
  2. Step 2: Convert to fraction form
    118,475.20/177,280.80 = 87,371.20/x
  3. Step 3: Cross multiply
    118,475.20x = 177,280.80 × 87,371.20
  4. Step 4: Simplify right side
    118,475.20x = 15,489,236,232.96
  5. Step 5: Solve for x
    x = 15,489,236,232.96/118,475.20
  6. Step 6: Final answer
    x = 130,738.22

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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.