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Finding the Fourth Proportional to 158,571.42, 218,826.81 and 86,951.22

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Solution

The fourth proportional to 158,571.42, 218,826.81 and 86,951.22 is: 119,991.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,571.42 : 218,826.81 = 86,951.22 : x
  2. Step 2: Convert to fraction form
    158,571.42/218,826.81 = 86,951.22/x
  3. Step 3: Cross multiply
    158,571.42x = 218,826.81 × 86,951.22
  4. Step 4: Simplify right side
    158,571.42x = 19,027,258,098.21
  5. Step 5: Solve for x
    x = 19,027,258,098.21/158,571.42
  6. Step 6: Final answer
    x = 119,991.72

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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.