Home / 87,711.18-121,139.37-59,367.66

Finding the Fourth Proportional to 87,711.18, 121,139.37 and 59,367.66

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Solution

The fourth proportional to 87,711.18, 121,139.37 and 59,367.66 is: 81,993.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,711.18 : 121,139.37 = 59,367.66 : x
  2. Step 2: Convert to fraction form
    87,711.18/121,139.37 = 59,367.66/x
  3. Step 3: Cross multiply
    87,711.18x = 121,139.37 × 59,367.66
  4. Step 4: Simplify right side
    87,711.18x = 7,191,760,930.77
  5. Step 5: Solve for x
    x = 7,191,760,930.77/87,711.18
  6. Step 6: Final answer
    x = 81,993.66

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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.