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Finding the Fourth Proportional to 85,121.40, 127,682.10 and 21,941.40

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Solution

The fourth proportional to 85,121.40, 127,682.10 and 21,941.40 is: 32,912.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,121.40 : 127,682.10 = 21,941.40 : x
  2. Step 2: Convert to fraction form
    85,121.40/127,682.10 = 21,941.40/x
  3. Step 3: Cross multiply
    85,121.40x = 127,682.10 × 21,941.40
  4. Step 4: Simplify right side
    85,121.40x = 2,801,524,028.94
  5. Step 5: Solve for x
    x = 2,801,524,028.94/85,121.40
  6. Step 6: Final answer
    x = 32,912.10

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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.