Home / 81,688.25-122,423.36-43,659.56

Finding the Fourth Proportional to 81,688.25, 122,423.36 and 43,659.56

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Solution

The fourth proportional to 81,688.25, 122,423.36 and 43,659.56 is: 65,431.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,688.25 : 122,423.36 = 43,659.56 : x
  2. Step 2: Convert to fraction form
    81,688.25/122,423.36 = 43,659.56/x
  3. Step 3: Cross multiply
    81,688.25x = 122,423.36 × 43,659.56
  4. Step 4: Simplify right side
    81,688.25x = 5,344,950,119.08
  5. Step 5: Solve for x
    x = 5,344,950,119.08/81,688.25
  6. Step 6: Final answer
    x = 65,431.07

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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.