Home / 80,208.12-120,309.71-38,118.50

Finding the Fourth Proportional to 80,208.12, 120,309.71 and 38,118.50

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Solution

The fourth proportional to 80,208.12, 120,309.71 and 38,118.50 is: 57,176.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,208.12 : 120,309.71 = 38,118.50 : x
  2. Step 2: Convert to fraction form
    80,208.12/120,309.71 = 38,118.50/x
  3. Step 3: Cross multiply
    80,208.12x = 120,309.71 × 38,118.50
  4. Step 4: Simplify right side
    80,208.12x = 4,586,025,339.66
  5. Step 5: Solve for x
    x = 4,586,025,339.66/80,208.12
  6. Step 6: Final answer
    x = 57,176.57

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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.