Home / 70,664.28-105,997.03-20,745.20

Finding the Fourth Proportional to 70,664.28, 105,997.03 and 20,745.20

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Solution

The fourth proportional to 70,664.28, 105,997.03 and 20,745.20 is: 31,117.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,664.28 : 105,997.03 = 20,745.20 : x
  2. Step 2: Convert to fraction form
    70,664.28/105,997.03 = 20,745.20/x
  3. Step 3: Cross multiply
    70,664.28x = 105,997.03 × 20,745.20
  4. Step 4: Simplify right side
    70,664.28x = 2,198,929,004.91
  5. Step 5: Solve for x
    x = 2,198,929,004.91/70,664.28
  6. Step 6: Final answer
    x = 31,117.97

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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.