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Finding the Fourth Proportional to 81,805.75, 122,710.14 and 25,644.60

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Solution

The fourth proportional to 81,805.75, 122,710.14 and 25,644.60 is: 38,467.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,805.75 : 122,710.14 = 25,644.60 : x
  2. Step 2: Convert to fraction form
    81,805.75/122,710.14 = 25,644.60/x
  3. Step 3: Cross multiply
    81,805.75x = 122,710.14 × 25,644.60
  4. Step 4: Simplify right side
    81,805.75x = 3,146,852,456.24
  5. Step 5: Solve for x
    x = 3,146,852,456.24/81,805.75
  6. Step 6: Final answer
    x = 38,467.38

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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.