Home / 109,836.80-164,606.88-80,115.20

Finding the Fourth Proportional to 109,836.80, 164,606.88 and 80,115.20

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Solution

The fourth proportional to 109,836.80, 164,606.88 and 80,115.20 is: 120,064.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,836.80 : 164,606.88 = 80,115.20 : x
  2. Step 2: Convert to fraction form
    109,836.80/164,606.88 = 80,115.20/x
  3. Step 3: Cross multiply
    109,836.80x = 164,606.88 × 80,115.20
  4. Step 4: Simplify right side
    109,836.80x = 13,187,513,112.58
  5. Step 5: Solve for x
    x = 13,187,513,112.58/109,836.80
  6. Step 6: Final answer
    x = 120,064.62

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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.