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Finding the Fourth Proportional to 85,825.55, 128,738.34 and 26,661.22

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Solution

The fourth proportional to 85,825.55, 128,738.34 and 26,661.22 is: 39,991.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,825.55 : 128,738.34 = 26,661.22 : x
  2. Step 2: Convert to fraction form
    85,825.55/128,738.34 = 26,661.22/x
  3. Step 3: Cross multiply
    85,825.55x = 128,738.34 × 26,661.22
  4. Step 4: Simplify right side
    85,825.55x = 3,432,320,883.33
  5. Step 5: Solve for x
    x = 3,432,320,883.33/85,825.55
  6. Step 6: Final answer
    x = 39,991.83

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Double scale
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Similar ratio
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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.