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Finding the Fourth Proportional to 118,228.80, 177,472.80 and 65,611.20

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Solution

The fourth proportional to 118,228.80, 177,472.80 and 65,611.20 is: 98,488.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,228.80 : 177,472.80 = 65,611.20 : x
  2. Step 2: Convert to fraction form
    118,228.80/177,472.80 = 65,611.20/x
  3. Step 3: Cross multiply
    118,228.80x = 177,472.80 × 65,611.20
  4. Step 4: Simplify right side
    118,228.80x = 11,644,203,375.36
  5. Step 5: Solve for x
    x = 11,644,203,375.36/118,228.80
  6. Step 6: Final answer
    x = 98,488.72

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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.