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Finding the Fourth Proportional to 203,071.54, 280,229.60 and 112,421.12

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Solution

The fourth proportional to 203,071.54, 280,229.60 and 112,421.12 is: 155,136.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,071.54 : 280,229.60 = 112,421.12 : x
  2. Step 2: Convert to fraction form
    203,071.54/280,229.60 = 112,421.12/x
  3. Step 3: Cross multiply
    203,071.54x = 280,229.60 × 112,421.12
  4. Step 4: Simplify right side
    203,071.54x = 31,503,725,489.15
  5. Step 5: Solve for x
    x = 31,503,725,489.15/203,071.54
  6. Step 6: Final answer
    x = 155,136.09

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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.