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Finding the Fourth Proportional to 81,556, 122,351.60 and 25,394.96

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Solution

The fourth proportional to 81,556, 122,351.60 and 25,394.96 is: 38,097.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,556 : 122,351.60 = 25,394.96 : x
  2. Step 2: Convert to fraction form
    81,556/122,351.60 = 25,394.96/x
  3. Step 3: Cross multiply
    81,556x = 122,351.60 × 25,394.96
  4. Step 4: Simplify right side
    81,556x = 3,107,113,987.94
  5. Step 5: Solve for x
    x = 3,107,113,987.94/81,556
  6. Step 6: Final answer
    x = 38,097.92

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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.