Home / 81,786.45-122,679.53-25,630.87

Finding the Fourth Proportional to 81,786.45, 122,679.53 and 25,630.87

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Solution

The fourth proportional to 81,786.45, 122,679.53 and 25,630.87 is: 38,446.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,786.45 : 122,679.53 = 25,630.87 : x
  2. Step 2: Convert to fraction form
    81,786.45/122,679.53 = 25,630.87/x
  3. Step 3: Cross multiply
    81,786.45x = 122,679.53 × 25,630.87
  4. Step 4: Simplify right side
    81,786.45x = 3,144,383,085.09
  5. Step 5: Solve for x
    x = 3,144,383,085.09/81,786.45
  6. Step 6: Final answer
    x = 38,446.26

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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.