Home / 81,227.07-121,545.36-67,055.31

Finding the Fourth Proportional to 81,227.07, 121,545.36 and 67,055.31

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Solution

The fourth proportional to 81,227.07, 121,545.36 and 67,055.31 is: 100,339.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,227.07 : 121,545.36 = 67,055.31 : x
  2. Step 2: Convert to fraction form
    81,227.07/121,545.36 = 67,055.31/x
  3. Step 3: Cross multiply
    81,227.07x = 121,545.36 × 67,055.31
  4. Step 4: Simplify right side
    81,227.07x = 8,150,261,793.86
  5. Step 5: Solve for x
    x = 8,150,261,793.86/81,227.07
  6. Step 6: Final answer
    x = 100,339.23

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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.