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Finding the Fourth Proportional to 109,863.20, 164,794.80 and 90,836.30

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Solution

The fourth proportional to 109,863.20, 164,794.80 and 90,836.30 is: 136,254.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,863.20 : 164,794.80 = 90,836.30 : x
  2. Step 2: Convert to fraction form
    109,863.20/164,794.80 = 90,836.30/x
  3. Step 3: Cross multiply
    109,863.20x = 164,794.80 × 90,836.30
  4. Step 4: Simplify right side
    109,863.20x = 14,969,349,891.24
  5. Step 5: Solve for x
    x = 14,969,349,891.24/109,863.20
  6. Step 6: Final answer
    x = 136,254.45

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1.5x scale

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.