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Finding the Fourth Proportional to 85,474.31, 128,240.01 and 53,847.86

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Solution

The fourth proportional to 85,474.31, 128,240.01 and 53,847.86 is: 80,789.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,474.31 : 128,240.01 = 53,847.86 : x
  2. Step 2: Convert to fraction form
    85,474.31/128,240.01 = 53,847.86/x
  3. Step 3: Cross multiply
    85,474.31x = 128,240.01 × 53,847.86
  4. Step 4: Simplify right side
    85,474.31x = 6,905,449,463.68
  5. Step 5: Solve for x
    x = 6,905,449,463.68/85,474.31
  6. Step 6: Final answer
    x = 80,789.77

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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.