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Finding the Fourth Proportional to 158,571.26, 218,828.40 and 86,949.80

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Solution

The fourth proportional to 158,571.26, 218,828.40 and 86,949.80 is: 119,990.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,571.26 : 218,828.40 = 86,949.80 : x
  2. Step 2: Convert to fraction form
    158,571.26/218,828.40 = 86,949.80/x
  3. Step 3: Cross multiply
    158,571.26x = 218,828.40 × 86,949.80
  4. Step 4: Simplify right side
    158,571.26x = 19,027,085,614.32
  5. Step 5: Solve for x
    x = 19,027,085,614.32/158,571.26
  6. Step 6: Final answer
    x = 119,990.76

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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.