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Finding the Fourth Proportional to 112,939.60, 169,639.80 and 109,022.80

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Solution

The fourth proportional to 112,939.60, 169,639.80 and 109,022.80 is: 163,756.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,939.60 : 169,639.80 = 109,022.80 : x
  2. Step 2: Convert to fraction form
    112,939.60/169,639.80 = 109,022.80/x
  3. Step 3: Cross multiply
    112,939.60x = 169,639.80 × 109,022.80
  4. Step 4: Simplify right side
    112,939.60x = 18,494,605,987.44
  5. Step 5: Solve for x
    x = 18,494,605,987.44/112,939.60
  6. Step 6: Final answer
    x = 163,756.61

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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.