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Finding the Fourth Proportional to 220,138.80, 303,823.65 and 123,349.20

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Solution

The fourth proportional to 220,138.80, 303,823.65 and 123,349.20 is: 170,239.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,138.80 : 303,823.65 = 123,349.20 : x
  2. Step 2: Convert to fraction form
    220,138.80/303,823.65 = 123,349.20/x
  3. Step 3: Cross multiply
    220,138.80x = 303,823.65 × 123,349.20
  4. Step 4: Simplify right side
    220,138.80x = 37,476,404,168.58
  5. Step 5: Solve for x
    x = 37,476,404,168.58/220,138.80
  6. Step 6: Final answer
    x = 170,239.89

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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.