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Finding the Fourth Proportional to 68,291.20, 102,451.20 and 21,548.80

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Solution

The fourth proportional to 68,291.20, 102,451.20 and 21,548.80 is: 32,327.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,291.20 : 102,451.20 = 21,548.80 : x
  2. Step 2: Convert to fraction form
    68,291.20/102,451.20 = 21,548.80/x
  3. Step 3: Cross multiply
    68,291.20x = 102,451.20 × 21,548.80
  4. Step 4: Simplify right side
    68,291.20x = 2,207,700,418.56
  5. Step 5: Solve for x
    x = 2,207,700,418.56/68,291.20
  6. Step 6: Final answer
    x = 32,327.74

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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.