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Finding the Fourth Proportional to 84,825.72, 127,205.73 and 28,650.78

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Solution

The fourth proportional to 84,825.72, 127,205.73 and 28,650.78 is: 42,965.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,825.72 : 127,205.73 = 28,650.78 : x
  2. Step 2: Convert to fraction form
    84,825.72/127,205.73 = 28,650.78/x
  3. Step 3: Cross multiply
    84,825.72x = 127,205.73 × 28,650.78
  4. Step 4: Simplify right side
    84,825.72x = 3,644,543,384.97
  5. Step 5: Solve for x
    x = 3,644,543,384.97/84,825.72
  6. Step 6: Final answer
    x = 42,965.07

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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.