Home / 81,236.66-111,857.37-71,108.42

Finding the Fourth Proportional to 81,236.66, 111,857.37 and 71,108.42

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Solution

The fourth proportional to 81,236.66, 111,857.37 and 71,108.42 is: 97,911.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,236.66 : 111,857.37 = 71,108.42 : x
  2. Step 2: Convert to fraction form
    81,236.66/111,857.37 = 71,108.42/x
  3. Step 3: Cross multiply
    81,236.66x = 111,857.37 × 71,108.42
  4. Step 4: Simplify right side
    81,236.66x = 7,954,000,846.06
  5. Step 5: Solve for x
    x = 7,954,000,846.06/81,236.66
  6. Step 6: Final answer
    x = 97,911.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.