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Finding the Fourth Proportional to 220,381.16, 304,189.07 and 129,789.68

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Solution

The fourth proportional to 220,381.16, 304,189.07 and 129,789.68 is: 179,146.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,381.16 : 304,189.07 = 129,789.68 : x
  2. Step 2: Convert to fraction form
    220,381.16/304,189.07 = 129,789.68/x
  3. Step 3: Cross multiply
    220,381.16x = 304,189.07 × 129,789.68
  4. Step 4: Simplify right side
    220,381.16x = 39,480,599,884.90
  5. Step 5: Solve for x
    x = 39,480,599,884.90/220,381.16
  6. Step 6: Final answer
    x = 179,146.90

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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.