Home / 121,208.20-181,898.70-68,561.80

Finding the Fourth Proportional to 121,208.20, 181,898.70 and 68,561.80

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Solution

The fourth proportional to 121,208.20, 181,898.70 and 68,561.80 is: 102,891.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,208.20 : 181,898.70 = 68,561.80 : x
  2. Step 2: Convert to fraction form
    121,208.20/181,898.70 = 68,561.80/x
  3. Step 3: Cross multiply
    121,208.20x = 181,898.70 × 68,561.80
  4. Step 4: Simplify right side
    121,208.20x = 12,471,302,289.66
  5. Step 5: Solve for x
    x = 12,471,302,289.66/121,208.20
  6. Step 6: Final answer
    x = 102,891.57

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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.