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Finding the Fourth Proportional to 80,863.48, 121,290.90 and 21,698.20

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Solution

The fourth proportional to 80,863.48, 121,290.90 and 21,698.20 is: 32,546.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,863.48 : 121,290.90 = 21,698.20 : x
  2. Step 2: Convert to fraction form
    80,863.48/121,290.90 = 21,698.20/x
  3. Step 3: Cross multiply
    80,863.48x = 121,290.90 × 21,698.20
  4. Step 4: Simplify right side
    80,863.48x = 2,631,794,206.38
  5. Step 5: Solve for x
    x = 2,631,794,206.38/80,863.48
  6. Step 6: Final answer
    x = 32,546.14

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1.5x scale

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.