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Finding the Fourth Proportional to 85,725.96, 128,671.84 and 41,383.86

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Solution

The fourth proportional to 85,725.96, 128,671.84 and 41,383.86 is: 62,115.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,725.96 : 128,671.84 = 41,383.86 : x
  2. Step 2: Convert to fraction form
    85,725.96/128,671.84 = 41,383.86/x
  3. Step 3: Cross multiply
    85,725.96x = 128,671.84 × 41,383.86
  4. Step 4: Simplify right side
    85,725.96x = 5,324,937,412.50
  5. Step 5: Solve for x
    x = 5,324,937,412.50/85,725.96
  6. Step 6: Final answer
    x = 62,115.81

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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.