Home / 120,121.31-180,246.14-77,991.41

Finding the Fourth Proportional to 120,121.31, 180,246.14 and 77,991.41

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Solution

The fourth proportional to 120,121.31, 180,246.14 and 77,991.41 is: 117,028.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,121.31 : 180,246.14 = 77,991.41 : x
  2. Step 2: Convert to fraction form
    120,121.31/180,246.14 = 77,991.41/x
  3. Step 3: Cross multiply
    120,121.31x = 180,246.14 × 77,991.41
  4. Step 4: Simplify right side
    120,121.31x = 14,057,650,605.66
  5. Step 5: Solve for x
    x = 14,057,650,605.66/120,121.31
  6. Step 6: Final answer
    x = 117,028.78

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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.