Home / 81,388.77-122,112.50-43,398.07

Finding the Fourth Proportional to 81,388.77, 122,112.50 and 43,398.07

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Solution

The fourth proportional to 81,388.77, 122,112.50 and 43,398.07 is: 65,112.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,388.77 : 122,112.50 = 43,398.07 : x
  2. Step 2: Convert to fraction form
    81,388.77/122,112.50 = 43,398.07/x
  3. Step 3: Cross multiply
    81,388.77x = 122,112.50 × 43,398.07
  4. Step 4: Simplify right side
    81,388.77x = 5,299,446,822.88
  5. Step 5: Solve for x
    x = 5,299,446,822.88/81,388.77
  6. Step 6: Final answer
    x = 65,112.75

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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.