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Finding the Fourth Proportional to 56,759.64, 85,158.90 and 21,709.32

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Solution

The fourth proportional to 56,759.64, 85,158.90 and 21,709.32 is: 32,571.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,759.64 : 85,158.90 = 21,709.32 : x
  2. Step 2: Convert to fraction form
    56,759.64/85,158.90 = 21,709.32/x
  3. Step 3: Cross multiply
    56,759.64x = 85,158.90 × 21,709.32
  4. Step 4: Simplify right side
    56,759.64x = 1,848,741,810.95
  5. Step 5: Solve for x
    x = 1,848,741,810.95/56,759.64
  6. Step 6: Final answer
    x = 32,571.42

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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.