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Finding the Fourth Proportional to 85,562.75, 128,257.97 and 35,670.47

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Solution

The fourth proportional to 85,562.75, 128,257.97 and 35,670.47 is: 53,469.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,562.75 : 128,257.97 = 35,670.47 : x
  2. Step 2: Convert to fraction form
    85,562.75/128,257.97 = 35,670.47/x
  3. Step 3: Cross multiply
    85,562.75x = 128,257.97 × 35,670.47
  4. Step 4: Simplify right side
    85,562.75x = 4,575,021,251.50
  5. Step 5: Solve for x
    x = 4,575,021,251.50/85,562.75
  6. Step 6: Final answer
    x = 53,469.78

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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.