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Finding the Fourth Proportional to 81,668.78, 122,477.23 and 26,251.82

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Solution

The fourth proportional to 81,668.78, 122,477.23 and 26,251.82 is: 39,369.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,668.78 : 122,477.23 = 26,251.82 : x
  2. Step 2: Convert to fraction form
    81,668.78/122,477.23 = 26,251.82/x
  3. Step 3: Cross multiply
    81,668.78x = 122,477.23 × 26,251.82
  4. Step 4: Simplify right side
    81,668.78x = 3,215,249,452.41
  5. Step 5: Solve for x
    x = 3,215,249,452.41/81,668.78
  6. Step 6: Final answer
    x = 39,369.39

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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.