Home / 120,119.31-180,243.14-77,989.41

Finding the Fourth Proportional to 120,119.31, 180,243.14 and 77,989.41

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Solution

The fourth proportional to 120,119.31, 180,243.14 and 77,989.41 is: 117,025.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,119.31 : 180,243.14 = 77,989.41 : x
  2. Step 2: Convert to fraction form
    120,119.31/180,243.14 = 77,989.41/x
  3. Step 3: Cross multiply
    120,119.31x = 180,243.14 × 77,989.41
  4. Step 4: Simplify right side
    120,119.31x = 14,057,055,755.20
  5. Step 5: Solve for x
    x = 14,057,055,755.20/120,119.31
  6. Step 6: Final answer
    x = 117,025.78

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1.5x scale

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.