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Finding the Fourth Proportional to 202,958.78, 280,076.20 and 112,318.56

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Solution

The fourth proportional to 202,958.78, 280,076.20 and 112,318.56 is: 154,995.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,958.78 : 280,076.20 = 112,318.56 : x
  2. Step 2: Convert to fraction form
    202,958.78/280,076.20 = 112,318.56/x
  3. Step 3: Cross multiply
    202,958.78x = 280,076.20 × 112,318.56
  4. Step 4: Simplify right side
    202,958.78x = 31,457,755,193.48
  5. Step 5: Solve for x
    x = 31,457,755,193.48/202,958.78
  6. Step 6: Final answer
    x = 154,995.79

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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.