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Finding the Fourth Proportional to 203,517.55, 280,871.48 and 112,902.72

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Solution

The fourth proportional to 203,517.55, 280,871.48 and 112,902.72 is: 155,815.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,517.55 : 280,871.48 = 112,902.72 : x
  2. Step 2: Convert to fraction form
    203,517.55/280,871.48 = 112,902.72/x
  3. Step 3: Cross multiply
    203,517.55x = 280,871.48 × 112,902.72
  4. Step 4: Simplify right side
    203,517.55x = 31,711,154,062.43
  5. Step 5: Solve for x
    x = 31,711,154,062.43/203,517.55
  6. Step 6: Final answer
    x = 155,815.33

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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.