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Finding the Fourth Proportional to 220,244.45, 303,911.52 and 129,580.47

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Solution

The fourth proportional to 220,244.45, 303,911.52 and 129,580.47 is: 178,805.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,244.45 : 303,911.52 = 129,580.47 : x
  2. Step 2: Convert to fraction form
    220,244.45/303,911.52 = 129,580.47/x
  3. Step 3: Cross multiply
    220,244.45x = 303,911.52 × 129,580.47
  4. Step 4: Simplify right side
    220,244.45x = 39,380,997,600.01
  5. Step 5: Solve for x
    x = 39,380,997,600.01/220,244.45
  6. Step 6: Final answer
    x = 178,805.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.