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Finding the Fourth Proportional to 72,808.56, 109,169.72 and 28,383.44

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Solution

The fourth proportional to 72,808.56, 109,169.72 and 28,383.44 is: 42,558.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,808.56 : 109,169.72 = 28,383.44 : x
  2. Step 2: Convert to fraction form
    72,808.56/109,169.72 = 28,383.44/x
  3. Step 3: Cross multiply
    72,808.56x = 109,169.72 × 28,383.44
  4. Step 4: Simplify right side
    72,808.56x = 3,098,612,197.44
  5. Step 5: Solve for x
    x = 3,098,612,197.44/72,808.56
  6. Step 6: Final answer
    x = 42,558.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.