Home / 81,638.22-122,457.33-26,238.54

Finding the Fourth Proportional to 81,638.22, 122,457.33 and 26,238.54

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Solution

The fourth proportional to 81,638.22, 122,457.33 and 26,238.54 is: 39,357.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,638.22 : 122,457.33 = 26,238.54 : x
  2. Step 2: Convert to fraction form
    81,638.22/122,457.33 = 26,238.54/x
  3. Step 3: Cross multiply
    81,638.22x = 122,457.33 × 26,238.54
  4. Step 4: Simplify right side
    81,638.22x = 3,213,101,551.50
  5. Step 5: Solve for x
    x = 3,213,101,551.50/81,638.22
  6. Step 6: Final answer
    x = 39,357.81

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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.