Home / 121,072.20-181,608.30-76,894.80

Finding the Fourth Proportional to 121,072.20, 181,608.30 and 76,894.80

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Solution

The fourth proportional to 121,072.20, 181,608.30 and 76,894.80 is: 115,342.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,072.20 : 181,608.30 = 76,894.80 : x
  2. Step 2: Convert to fraction form
    121,072.20/181,608.30 = 76,894.80/x
  3. Step 3: Cross multiply
    121,072.20x = 181,608.30 × 76,894.80
  4. Step 4: Simplify right side
    121,072.20x = 13,964,733,906.84
  5. Step 5: Solve for x
    x = 13,964,733,906.84/121,072.20
  6. Step 6: Final answer
    x = 115,342.20

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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.