Home / 80,036.15-120,054.20-20,871.65

Finding the Fourth Proportional to 80,036.15, 120,054.20 and 20,871.65

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Solution

The fourth proportional to 80,036.15, 120,054.20 and 20,871.65 is: 31,307.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,036.15 : 120,054.20 = 20,871.65 : x
  2. Step 2: Convert to fraction form
    80,036.15/120,054.20 = 20,871.65/x
  3. Step 3: Cross multiply
    80,036.15x = 120,054.20 × 20,871.65
  4. Step 4: Simplify right side
    80,036.15x = 2,505,729,439.21
  5. Step 5: Solve for x
    x = 2,505,729,439.21/80,036.15
  6. Step 6: Final answer
    x = 31,307.47

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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.