Home / 70,906.18-106,358.06-20,986

Finding the Fourth Proportional to 70,906.18, 106,358.06 and 20,986

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Solution

The fourth proportional to 70,906.18, 106,358.06 and 20,986 is: 31,478.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,906.18 : 106,358.06 = 20,986 : x
  2. Step 2: Convert to fraction form
    70,906.18/106,358.06 = 20,986/x
  3. Step 3: Cross multiply
    70,906.18x = 106,358.06 × 20,986
  4. Step 4: Simplify right side
    70,906.18x = 2,232,030,247.16
  5. Step 5: Solve for x
    x = 2,232,030,247.16/70,906.18
  6. Step 6: Final answer
    x = 31,478.64

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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.