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Finding the Fourth Proportional to 85,542.60, 128,313.90 and 23,213.10

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Solution

The fourth proportional to 85,542.60, 128,313.90 and 23,213.10 is: 34,819.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,542.60 : 128,313.90 = 23,213.10 : x
  2. Step 2: Convert to fraction form
    85,542.60/128,313.90 = 23,213.10/x
  3. Step 3: Cross multiply
    85,542.60x = 128,313.90 × 23,213.10
  4. Step 4: Simplify right side
    85,542.60x = 2,978,563,392.09
  5. Step 5: Solve for x
    x = 2,978,563,392.09/85,542.60
  6. Step 6: Final answer
    x = 34,819.65

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Similar ratio
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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.