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Finding the Fourth Proportional to 220,128.80, 330,322.80 and 79,901.60

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Solution

The fourth proportional to 220,128.80, 330,322.80 and 79,901.60 is: 119,899.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,128.80 : 330,322.80 = 79,901.60 : x
  2. Step 2: Convert to fraction form
    220,128.80/330,322.80 = 79,901.60/x
  3. Step 3: Cross multiply
    220,128.80x = 330,322.80 × 79,901.60
  4. Step 4: Simplify right side
    220,128.80x = 26,393,320,236.48
  5. Step 5: Solve for x
    x = 26,393,320,236.48/220,128.80
  6. Step 6: Final answer
    x = 119,899.44

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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.