Home / 81,157.76-121,411.68-70,183.04

Finding the Fourth Proportional to 81,157.76, 121,411.68 and 70,183.04

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Solution

The fourth proportional to 81,157.76, 121,411.68 and 70,183.04 is: 104,993.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,157.76 : 121,411.68 = 70,183.04 : x
  2. Step 2: Convert to fraction form
    81,157.76/121,411.68 = 70,183.04/x
  3. Step 3: Cross multiply
    81,157.76x = 121,411.68 × 70,183.04
  4. Step 4: Simplify right side
    81,157.76x = 8,521,040,793.91
  5. Step 5: Solve for x
    x = 8,521,040,793.91/81,157.76
  6. Step 6: Final answer
    x = 104,993.54

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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.