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Finding the Fourth Proportional to 45,325, 67,938.90 and 21,899.80

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Solution

The fourth proportional to 45,325, 67,938.90 and 21,899.80 is: 32,826.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,325 : 67,938.90 = 21,899.80 : x
  2. Step 2: Convert to fraction form
    45,325/67,938.90 = 21,899.80/x
  3. Step 3: Cross multiply
    45,325x = 67,938.90 × 21,899.80
  4. Step 4: Simplify right side
    45,325x = 1,487,848,322.22
  5. Step 5: Solve for x
    x = 1,487,848,322.22/45,325
  6. Step 6: Final answer
    x = 32,826.22

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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.