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Finding the Fourth Proportional to 77,025, 115,556.97 and 21,621

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Solution

The fourth proportional to 77,025, 115,556.97 and 21,621 is: 32,436.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,025 : 115,556.97 = 21,621 : x
  2. Step 2: Convert to fraction form
    77,025/115,556.97 = 21,621/x
  3. Step 3: Cross multiply
    77,025x = 115,556.97 × 21,621
  4. Step 4: Simplify right side
    77,025x = 2,498,457,248.37
  5. Step 5: Solve for x
    x = 2,498,457,248.37/77,025
  6. Step 6: Final answer
    x = 32,436.97

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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.