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Finding the Fourth Proportional to 85,076.42, 127,613.76 and 21,896.30

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Solution

The fourth proportional to 85,076.42, 127,613.76 and 21,896.30 is: 32,844.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,076.42 : 127,613.76 = 21,896.30 : x
  2. Step 2: Convert to fraction form
    85,076.42/127,613.76 = 21,896.30/x
  3. Step 3: Cross multiply
    85,076.42x = 127,613.76 × 21,896.30
  4. Step 4: Simplify right side
    85,076.42x = 2,794,268,425.54
  5. Step 5: Solve for x
    x = 2,794,268,425.54/85,076.42
  6. Step 6: Final answer
    x = 32,844.22

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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.