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Finding the Fourth Proportional to 84,836.72, 127,202.81 and 28,671.54

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Solution

The fourth proportional to 84,836.72, 127,202.81 and 28,671.54 is: 42,989.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,836.72 : 127,202.81 = 28,671.54 : x
  2. Step 2: Convert to fraction form
    84,836.72/127,202.81 = 28,671.54/x
  3. Step 3: Cross multiply
    84,836.72x = 127,202.81 × 28,671.54
  4. Step 4: Simplify right side
    84,836.72x = 3,647,100,455.03
  5. Step 5: Solve for x
    x = 3,647,100,455.03/84,836.72
  6. Step 6: Final answer
    x = 42,989.64

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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.