Home / 109,664.20-164,496.30-80,139.70

Finding the Fourth Proportional to 109,664.20, 164,496.30 and 80,139.70

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Solution

The fourth proportional to 109,664.20, 164,496.30 and 80,139.70 is: 120,209.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,664.20 : 164,496.30 = 80,139.70 : x
  2. Step 2: Convert to fraction form
    109,664.20/164,496.30 = 80,139.70/x
  3. Step 3: Cross multiply
    109,664.20x = 164,496.30 × 80,139.70
  4. Step 4: Simplify right side
    109,664.20x = 13,182,684,133.11
  5. Step 5: Solve for x
    x = 13,182,684,133.11/109,664.20
  6. Step 6: Final answer
    x = 120,209.55

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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.