Home / 121,377.03-181,939.20-67,990.74

Finding the Fourth Proportional to 121,377.03, 181,939.20 and 67,990.74

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Solution

The fourth proportional to 121,377.03, 181,939.20 and 67,990.74 is: 101,915.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,377.03 : 181,939.20 = 67,990.74 : x
  2. Step 2: Convert to fraction form
    121,377.03/181,939.20 = 67,990.74/x
  3. Step 3: Cross multiply
    121,377.03x = 181,939.20 × 67,990.74
  4. Step 4: Simplify right side
    121,377.03x = 12,370,180,843.01
  5. Step 5: Solve for x
    x = 12,370,180,843.01/121,377.03
  6. Step 6: Final answer
    x = 101,915.34

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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.