Home / 80,975.16-121,292.64-51,377.76

Finding the Fourth Proportional to 80,975.16, 121,292.64 and 51,377.76

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Solution

The fourth proportional to 80,975.16, 121,292.64 and 51,377.76 is: 76,958.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,975.16 : 121,292.64 = 51,377.76 : x
  2. Step 2: Convert to fraction form
    80,975.16/121,292.64 = 51,377.76/x
  3. Step 3: Cross multiply
    80,975.16x = 121,292.64 × 51,377.76
  4. Step 4: Simplify right side
    80,975.16x = 6,231,744,147.69
  5. Step 5: Solve for x
    x = 6,231,744,147.69/80,975.16
  6. Step 6: Final answer
    x = 76,958.71

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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.