Home / 81,983.48-113,137.63-51,782.31

Finding the Fourth Proportional to 81,983.48, 113,137.63 and 51,782.31

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Solution

The fourth proportional to 81,983.48, 113,137.63 and 51,782.31 is: 71,459.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,983.48 : 113,137.63 = 51,782.31 : x
  2. Step 2: Convert to fraction form
    81,983.48/113,137.63 = 51,782.31/x
  3. Step 3: Cross multiply
    81,983.48x = 113,137.63 × 51,782.31
  4. Step 4: Simplify right side
    81,983.48x = 5,858,527,699.87
  5. Step 5: Solve for x
    x = 5,858,527,699.87/81,983.48
  6. Step 6: Final answer
    x = 71,459.86

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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.