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Finding the Fourth Proportional to 139,199.44, 192,115.84 and 81,836.32

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Solution

The fourth proportional to 139,199.44, 192,115.84 and 81,836.32 is: 112,946.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,199.44 : 192,115.84 = 81,836.32 : x
  2. Step 2: Convert to fraction form
    139,199.44/192,115.84 = 81,836.32/x
  3. Step 3: Cross multiply
    139,199.44x = 192,115.84 × 81,836.32
  4. Step 4: Simplify right side
    139,199.44x = 15,722,053,359.31
  5. Step 5: Solve for x
    x = 15,722,053,359.31/139,199.44
  6. Step 6: Final answer
    x = 112,946.24

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1.5x scale

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.