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Finding the Fourth Proportional to 220,215.48, 303,903 and 124,720.80

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Solution

The fourth proportional to 220,215.48, 303,903 and 124,720.80 is: 172,117.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,215.48 : 303,903 = 124,720.80 : x
  2. Step 2: Convert to fraction form
    220,215.48/303,903 = 124,720.80/x
  3. Step 3: Cross multiply
    220,215.48x = 303,903 × 124,720.80
  4. Step 4: Simplify right side
    220,215.48x = 37,903,025,282.40
  5. Step 5: Solve for x
    x = 37,903,025,282.40/220,215.48
  6. Step 6: Final answer
    x = 172,117.90

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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.