Home / 126,654.39-189,856.40-81,648.36

Finding the Fourth Proportional to 126,654.39, 189,856.40 and 81,648.36

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Solution

The fourth proportional to 126,654.39, 189,856.40 and 81,648.36 is: 122,391.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,654.39 : 189,856.40 = 81,648.36 : x
  2. Step 2: Convert to fraction form
    126,654.39/189,856.40 = 81,648.36/x
  3. Step 3: Cross multiply
    126,654.39x = 189,856.40 × 81,648.36
  4. Step 4: Simplify right side
    126,654.39x = 15,501,463,287.26
  5. Step 5: Solve for x
    x = 15,501,463,287.26/126,654.39
  6. Step 6: Final answer
    x = 122,391.84

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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.