Home / 120,738.40-181,107.60-76,415.20

Finding the Fourth Proportional to 120,738.40, 181,107.60 and 76,415.20

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Solution

The fourth proportional to 120,738.40, 181,107.60 and 76,415.20 is: 114,622.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,738.40 : 181,107.60 = 76,415.20 : x
  2. Step 2: Convert to fraction form
    120,738.40/181,107.60 = 76,415.20/x
  3. Step 3: Cross multiply
    120,738.40x = 181,107.60 × 76,415.20
  4. Step 4: Simplify right side
    120,738.40x = 13,839,373,475.52
  5. Step 5: Solve for x
    x = 13,839,373,475.52/120,738.40
  6. Step 6: Final answer
    x = 114,622.80

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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.