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Finding the Fourth Proportional to 45,061.80, 67,631.10 and 20,140.20

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Solution

The fourth proportional to 45,061.80, 67,631.10 and 20,140.20 is: 30,227.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,061.80 : 67,631.10 = 20,140.20 : x
  2. Step 2: Convert to fraction form
    45,061.80/67,631.10 = 20,140.20/x
  3. Step 3: Cross multiply
    45,061.80x = 67,631.10 × 20,140.20
  4. Step 4: Simplify right side
    45,061.80x = 1,362,103,880.22
  5. Step 5: Solve for x
    x = 1,362,103,880.22/45,061.80
  6. Step 6: Final answer
    x = 30,227.46

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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.