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Finding the Fourth Proportional to 68,811.60, 103,217.72 and 18,892.40

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Solution

The fourth proportional to 68,811.60, 103,217.72 and 18,892.40 is: 28,338.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,811.60 : 103,217.72 = 18,892.40 : x
  2. Step 2: Convert to fraction form
    68,811.60/103,217.72 = 18,892.40/x
  3. Step 3: Cross multiply
    68,811.60x = 103,217.72 × 18,892.40
  4. Step 4: Simplify right side
    68,811.60x = 1,950,030,453.33
  5. Step 5: Solve for x
    x = 1,950,030,453.33/68,811.60
  6. Step 6: Final answer
    x = 28,338.69

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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.