Home / 120,866.20-181,299.30-76,688.80

Finding the Fourth Proportional to 120,866.20, 181,299.30 and 76,688.80

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Solution

The fourth proportional to 120,866.20, 181,299.30 and 76,688.80 is: 115,033.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,866.20 : 181,299.30 = 76,688.80 : x
  2. Step 2: Convert to fraction form
    120,866.20/181,299.30 = 76,688.80/x
  3. Step 3: Cross multiply
    120,866.20x = 181,299.30 × 76,688.80
  4. Step 4: Simplify right side
    120,866.20x = 13,903,625,757.84
  5. Step 5: Solve for x
    x = 13,903,625,757.84/120,866.20
  6. Step 6: Final answer
    x = 115,033.20

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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.