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Finding the Fourth Proportional to 45,409.80, 68,114.70 and 20,440.20

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Solution

The fourth proportional to 45,409.80, 68,114.70 and 20,440.20 is: 30,660.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,409.80 : 68,114.70 = 20,440.20 : x
  2. Step 2: Convert to fraction form
    45,409.80/68,114.70 = 20,440.20/x
  3. Step 3: Cross multiply
    45,409.80x = 68,114.70 × 20,440.20
  4. Step 4: Simplify right side
    45,409.80x = 1,392,278,090.94
  5. Step 5: Solve for x
    x = 1,392,278,090.94/45,409.80
  6. Step 6: Final answer
    x = 30,660.30

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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.