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Finding the Fourth Proportional to 57,285.50, 85,991.09 and 45,514.91

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Solution

The fourth proportional to 57,285.50, 85,991.09 and 45,514.91 is: 68,322.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,285.50 : 85,991.09 = 45,514.91 : x
  2. Step 2: Convert to fraction form
    57,285.50/85,991.09 = 45,514.91/x
  3. Step 3: Cross multiply
    57,285.50x = 85,991.09 × 45,514.91
  4. Step 4: Simplify right side
    57,285.50x = 3,913,876,709.56
  5. Step 5: Solve for x
    x = 3,913,876,709.56/57,285.50
  6. Step 6: Final answer
    x = 68,322.30

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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.