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Finding the Fourth Proportional to 85,524.72, 128,199.60 and 43,326.60

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Solution

The fourth proportional to 85,524.72, 128,199.60 and 43,326.60 is: 64,945.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,524.72 : 128,199.60 = 43,326.60 : x
  2. Step 2: Convert to fraction form
    85,524.72/128,199.60 = 43,326.60/x
  3. Step 3: Cross multiply
    85,524.72x = 128,199.60 × 43,326.60
  4. Step 4: Simplify right side
    85,524.72x = 5,554,452,789.36
  5. Step 5: Solve for x
    x = 5,554,452,789.36/85,524.72
  6. Step 6: Final answer
    x = 64,945.58

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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.