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Finding the Fourth Proportional to 45,489.60, 68,218.20 and 20,541.60

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Solution

The fourth proportional to 45,489.60, 68,218.20 and 20,541.60 is: 30,805.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,489.60 : 68,218.20 = 20,541.60 : x
  2. Step 2: Convert to fraction form
    45,489.60/68,218.20 = 20,541.60/x
  3. Step 3: Cross multiply
    45,489.60x = 68,218.20 × 20,541.60
  4. Step 4: Simplify right side
    45,489.60x = 1,401,310,977.12
  5. Step 5: Solve for x
    x = 1,401,310,977.12/45,489.60
  6. Step 6: Final answer
    x = 30,805.08

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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.