Home / 70,939.24-106,221.10-42,821.70

Finding the Fourth Proportional to 70,939.24, 106,221.10 and 42,821.70

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Solution

The fourth proportional to 70,939.24, 106,221.10 and 42,821.70 is: 64,119.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,939.24 : 106,221.10 = 42,821.70 : x
  2. Step 2: Convert to fraction form
    70,939.24/106,221.10 = 42,821.70/x
  3. Step 3: Cross multiply
    70,939.24x = 106,221.10 × 42,821.70
  4. Step 4: Simplify right side
    70,939.24x = 4,548,568,077.87
  5. Step 5: Solve for x
    x = 4,548,568,077.87/70,939.24
  6. Step 6: Final answer
    x = 64,119.21

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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.