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Finding the Fourth Proportional to 85,789.56, 128,507.22 and 63,627.96

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Solution

The fourth proportional to 85,789.56, 128,507.22 and 63,627.96 is: 95,310.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,789.56 : 128,507.22 = 63,627.96 : x
  2. Step 2: Convert to fraction form
    85,789.56/128,507.22 = 63,627.96/x
  3. Step 3: Cross multiply
    85,789.56x = 128,507.22 × 63,627.96
  4. Step 4: Simplify right side
    85,789.56x = 8,176,652,253.87
  5. Step 5: Solve for x
    x = 8,176,652,253.87/85,789.56
  6. Step 6: Final answer
    x = 95,310.57

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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.