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Finding the Fourth Proportional to 85,300.25, 127,921.82 and 28,361.03

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Solution

The fourth proportional to 85,300.25, 127,921.82 and 28,361.03 is: 42,532.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,300.25 : 127,921.82 = 28,361.03 : x
  2. Step 2: Convert to fraction form
    85,300.25/127,921.82 = 28,361.03/x
  3. Step 3: Cross multiply
    85,300.25x = 127,921.82 × 28,361.03
  4. Step 4: Simplify right side
    85,300.25x = 3,627,993,793.26
  5. Step 5: Solve for x
    x = 3,627,993,793.26/85,300.25
  6. Step 6: Final answer
    x = 42,532.04

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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.