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Finding the Fourth Proportional to 203,639.82, 281,018.64 and 112,993.80

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Solution

The fourth proportional to 203,639.82, 281,018.64 and 112,993.80 is: 155,929.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,639.82 : 281,018.64 = 112,993.80 : x
  2. Step 2: Convert to fraction form
    203,639.82/281,018.64 = 112,993.80/x
  3. Step 3: Cross multiply
    203,639.82x = 281,018.64 × 112,993.80
  4. Step 4: Simplify right side
    203,639.82x = 31,753,364,004.43
  5. Step 5: Solve for x
    x = 31,753,364,004.43/203,639.82
  6. Step 6: Final answer
    x = 155,929.05

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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.