Home / 81,837.54-113,138.78-81,090.32

Finding the Fourth Proportional to 81,837.54, 113,138.78 and 81,090.32

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Solution

The fourth proportional to 81,837.54, 113,138.78 and 81,090.32 is: 112,105.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,837.54 : 113,138.78 = 81,090.32 : x
  2. Step 2: Convert to fraction form
    81,837.54/113,138.78 = 81,090.32/x
  3. Step 3: Cross multiply
    81,837.54x = 113,138.78 × 81,090.32
  4. Step 4: Simplify right side
    81,837.54x = 9,174,458,903.46
  5. Step 5: Solve for x
    x = 9,174,458,903.46/81,837.54
  6. Step 6: Final answer
    x = 112,105.75

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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.