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Finding the Fourth Proportional to 158,353.89, 218,528.40 and 86,736.48

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Solution

The fourth proportional to 158,353.89, 218,528.40 and 86,736.48 is: 119,696.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,353.89 : 218,528.40 = 86,736.48 : x
  2. Step 2: Convert to fraction form
    158,353.89/218,528.40 = 86,736.48/x
  3. Step 3: Cross multiply
    158,353.89x = 218,528.40 × 86,736.48
  4. Step 4: Simplify right side
    158,353.89x = 18,954,383,550.53
  5. Step 5: Solve for x
    x = 18,954,383,550.53/158,353.89
  6. Step 6: Final answer
    x = 119,696.35

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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.