Home / 79,905.12-119,862.18-20,739.21

Finding the Fourth Proportional to 79,905.12, 119,862.18 and 20,739.21

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Solution

The fourth proportional to 79,905.12, 119,862.18 and 20,739.21 is: 31,109.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,905.12 : 119,862.18 = 20,739.21 : x
  2. Step 2: Convert to fraction form
    79,905.12/119,862.18 = 20,739.21/x
  3. Step 3: Cross multiply
    79,905.12x = 119,862.18 × 20,739.21
  4. Step 4: Simplify right side
    79,905.12x = 2,485,846,922.08
  5. Step 5: Solve for x
    x = 2,485,846,922.08/79,905.12
  6. Step 6: Final answer
    x = 31,109.98

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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.