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Finding the Fourth Proportional to 73,168.81, 109,753.19 and 20,578.28

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Solution

The fourth proportional to 73,168.81, 109,753.19 and 20,578.28 is: 30,867.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,168.81 : 109,753.19 = 20,578.28 : x
  2. Step 2: Convert to fraction form
    73,168.81/109,753.19 = 20,578.28/x
  3. Step 3: Cross multiply
    73,168.81x = 109,753.19 × 20,578.28
  4. Step 4: Simplify right side
    73,168.81x = 2,258,531,874.71
  5. Step 5: Solve for x
    x = 2,258,531,874.71/73,168.81
  6. Step 6: Final answer
    x = 30,867.41

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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.