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Finding the Fourth Proportional to 220,135.80, 303,788.72 and 129,495.48

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Solution

The fourth proportional to 220,135.80, 303,788.72 and 129,495.48 is: 178,704.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,135.80 : 303,788.72 = 129,495.48 : x
  2. Step 2: Convert to fraction form
    220,135.80/303,788.72 = 129,495.48/x
  3. Step 3: Cross multiply
    220,135.80x = 303,788.72 × 129,495.48
  4. Step 4: Simplify right side
    220,135.80x = 39,339,266,114.99
  5. Step 5: Solve for x
    x = 39,339,266,114.99/220,135.80
  6. Step 6: Final answer
    x = 178,704.54

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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.