Home / 71,078.28-106,622.08-20,478.66

Finding the Fourth Proportional to 71,078.28, 106,622.08 and 20,478.66

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Solution

The fourth proportional to 71,078.28, 106,622.08 and 20,478.66 is: 30,719.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,078.28 : 106,622.08 = 20,478.66 : x
  2. Step 2: Convert to fraction form
    71,078.28/106,622.08 = 20,478.66/x
  3. Step 3: Cross multiply
    71,078.28x = 106,622.08 × 20,478.66
  4. Step 4: Simplify right side
    71,078.28x = 2,183,477,324.81
  5. Step 5: Solve for x
    x = 2,183,477,324.81/71,078.28
  6. Step 6: Final answer
    x = 30,719.33

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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.