Home / 120,721.20-181,227.60-119,846.40

Finding the Fourth Proportional to 120,721.20, 181,227.60 and 119,846.40

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Solution

The fourth proportional to 120,721.20, 181,227.60 and 119,846.40 is: 179,914.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,721.20 : 181,227.60 = 119,846.40 : x
  2. Step 2: Convert to fraction form
    120,721.20/181,227.60 = 119,846.40/x
  3. Step 3: Cross multiply
    120,721.20x = 181,227.60 × 119,846.40
  4. Step 4: Simplify right side
    120,721.20x = 21,719,475,440.64
  5. Step 5: Solve for x
    x = 21,719,475,440.64/120,721.20
  6. Step 6: Final answer
    x = 179,914.34

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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.