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Finding the Fourth Proportional to 203,016.40, 280,160.40 and 112,372.48

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Solution

The fourth proportional to 203,016.40, 280,160.40 and 112,372.48 is: 155,072.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,016.40 : 280,160.40 = 112,372.48 : x
  2. Step 2: Convert to fraction form
    203,016.40/280,160.40 = 112,372.48/x
  3. Step 3: Cross multiply
    203,016.40x = 280,160.40 × 112,372.48
  4. Step 4: Simplify right side
    203,016.40x = 31,482,318,945.79
  5. Step 5: Solve for x
    x = 31,482,318,945.79/203,016.40
  6. Step 6: Final answer
    x = 155,072.79

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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.