Home / 79,972.80-119,959.36-20,808.38

Finding the Fourth Proportional to 79,972.80, 119,959.36 and 20,808.38

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Solution

The fourth proportional to 79,972.80, 119,959.36 and 20,808.38 is: 31,212.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,972.80 : 119,959.36 = 20,808.38 : x
  2. Step 2: Convert to fraction form
    79,972.80/119,959.36 = 20,808.38/x
  3. Step 3: Cross multiply
    79,972.80x = 119,959.36 × 20,808.38
  4. Step 4: Simplify right side
    79,972.80x = 2,496,159,947.44
  5. Step 5: Solve for x
    x = 2,496,159,947.44/79,972.80
  6. Step 6: Final answer
    x = 31,212.61

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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.