Home / 81,856.37-112,991.66-51,661.34

Finding the Fourth Proportional to 81,856.37, 112,991.66 and 51,661.34

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Solution

The fourth proportional to 81,856.37, 112,991.66 and 51,661.34 is: 71,311.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,856.37 : 112,991.66 = 51,661.34 : x
  2. Step 2: Convert to fraction form
    81,856.37/112,991.66 = 51,661.34/x
  3. Step 3: Cross multiply
    81,856.37x = 112,991.66 × 51,661.34
  4. Step 4: Simplify right side
    81,856.37x = 5,837,300,994.19
  5. Step 5: Solve for x
    x = 5,837,300,994.19/81,856.37
  6. Step 6: Final answer
    x = 71,311.50

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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.