Home / 81,358.22-121,991.63-55,741.46

Finding the Fourth Proportional to 81,358.22, 121,991.63 and 55,741.46

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Solution

The fourth proportional to 81,358.22, 121,991.63 and 55,741.46 is: 83,580.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,358.22 : 121,991.63 = 55,741.46 : x
  2. Step 2: Convert to fraction form
    81,358.22/121,991.63 = 55,741.46/x
  3. Step 3: Cross multiply
    81,358.22x = 121,991.63 × 55,741.46
  4. Step 4: Simplify right side
    81,358.22x = 6,799,991,563.98
  5. Step 5: Solve for x
    x = 6,799,991,563.98/81,358.22
  6. Step 6: Final answer
    x = 83,580.88

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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.