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Finding the Fourth Proportional to 81,417.70, 122,143.97 and 25,256.59

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Solution

The fourth proportional to 81,417.70, 122,143.97 and 25,256.59 is: 37,890.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,417.70 : 122,143.97 = 25,256.59 : x
  2. Step 2: Convert to fraction form
    81,417.70/122,143.97 = 25,256.59/x
  3. Step 3: Cross multiply
    81,417.70x = 122,143.97 × 25,256.59
  4. Step 4: Simplify right side
    81,417.70x = 3,084,940,044.98
  5. Step 5: Solve for x
    x = 3,084,940,044.98/81,417.70
  6. Step 6: Final answer
    x = 37,890.29

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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.