Home / 87,711.55-121,014.31-53,684.57

Finding the Fourth Proportional to 87,711.55, 121,014.31 and 53,684.57

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Solution

The fourth proportional to 87,711.55, 121,014.31 and 53,684.57 is: 74,067.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,711.55 : 121,014.31 = 53,684.57 : x
  2. Step 2: Convert to fraction form
    87,711.55/121,014.31 = 53,684.57/x
  3. Step 3: Cross multiply
    87,711.55x = 121,014.31 × 53,684.57
  4. Step 4: Simplify right side
    87,711.55x = 6,496,600,322.70
  5. Step 5: Solve for x
    x = 6,496,600,322.70/87,711.55
  6. Step 6: Final answer
    x = 74,067.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.