Home / 204,020.64-306,131.40-91,780.20

Finding the Fourth Proportional to 204,020.64, 306,131.40 and 91,780.20

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Solution

The fourth proportional to 204,020.64, 306,131.40 and 91,780.20 is: 137,715.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    204,020.64 : 306,131.40 = 91,780.20 : x
  2. Step 2: Convert to fraction form
    204,020.64/306,131.40 = 91,780.20/x
  3. Step 3: Cross multiply
    204,020.64x = 306,131.40 × 91,780.20
  4. Step 4: Simplify right side
    204,020.64x = 28,096,801,118.28
  5. Step 5: Solve for x
    x = 28,096,801,118.28/204,020.64
  6. Step 6: Final answer
    x = 137,715.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.