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Finding the Fourth Proportional to 76,885.73, 115,347.80 and 21,481.25

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Solution

The fourth proportional to 76,885.73, 115,347.80 and 21,481.25 is: 32,227.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,885.73 : 115,347.80 = 21,481.25 : x
  2. Step 2: Convert to fraction form
    76,885.73/115,347.80 = 21,481.25/x
  3. Step 3: Cross multiply
    76,885.73x = 115,347.80 × 21,481.25
  4. Step 4: Simplify right side
    76,885.73x = 2,477,814,928.75
  5. Step 5: Solve for x
    x = 2,477,814,928.75/76,885.73
  6. Step 6: Final answer
    x = 32,227.24

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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.