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Finding the Fourth Proportional to 109,104.64, 150,388.86 and 81,464.61

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Solution

The fourth proportional to 109,104.64, 150,388.86 and 81,464.61 is: 112,290.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,104.64 : 150,388.86 = 81,464.61 : x
  2. Step 2: Convert to fraction form
    109,104.64/150,388.86 = 81,464.61/x
  3. Step 3: Cross multiply
    109,104.64x = 150,388.86 × 81,464.61
  4. Step 4: Simplify right side
    109,104.64x = 12,251,369,828.24
  5. Step 5: Solve for x
    x = 12,251,369,828.24/109,104.64
  6. Step 6: Final answer
    x = 112,290.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.