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Finding the Fourth Proportional to 45,672.80, 68,476.80 and 20,724.80

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Solution

The fourth proportional to 45,672.80, 68,476.80 and 20,724.80 is: 31,072.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,672.80 : 68,476.80 = 20,724.80 : x
  2. Step 2: Convert to fraction form
    45,672.80/68,476.80 = 20,724.80/x
  3. Step 3: Cross multiply
    45,672.80x = 68,476.80 × 20,724.80
  4. Step 4: Simplify right side
    45,672.80x = 1,419,167,984.64
  5. Step 5: Solve for x
    x = 1,419,167,984.64/45,672.80
  6. Step 6: Final answer
    x = 31,072.50

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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.