Home / 109,865.20-164,797.80-90,838.30

Finding the Fourth Proportional to 109,865.20, 164,797.80 and 90,838.30

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Solution

The fourth proportional to 109,865.20, 164,797.80 and 90,838.30 is: 136,257.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,865.20 : 164,797.80 = 90,838.30 : x
  2. Step 2: Convert to fraction form
    109,865.20/164,797.80 = 90,838.30/x
  3. Step 3: Cross multiply
    109,865.20x = 164,797.80 × 90,838.30
  4. Step 4: Simplify right side
    109,865.20x = 14,969,951,995.74
  5. Step 5: Solve for x
    x = 14,969,951,995.74/109,865.20
  6. Step 6: Final answer
    x = 136,257.45

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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.