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Finding the Fourth Proportional to 45,059.80, 67,628.10 and 20,138.20

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Solution

The fourth proportional to 45,059.80, 67,628.10 and 20,138.20 is: 30,224.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,059.80 : 67,628.10 = 20,138.20 : x
  2. Step 2: Convert to fraction form
    45,059.80/67,628.10 = 20,138.20/x
  3. Step 3: Cross multiply
    45,059.80x = 67,628.10 × 20,138.20
  4. Step 4: Simplify right side
    45,059.80x = 1,361,908,203.42
  5. Step 5: Solve for x
    x = 1,361,908,203.42/45,059.80
  6. Step 6: Final answer
    x = 30,224.46

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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.