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Finding the Fourth Proportional to 154,863.36, 213,736.32 and 87,816.96

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Solution

The fourth proportional to 154,863.36, 213,736.32 and 87,816.96 is: 121,201.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,863.36 : 213,736.32 = 87,816.96 : x
  2. Step 2: Convert to fraction form
    154,863.36/213,736.32 = 87,816.96/x
  3. Step 3: Cross multiply
    154,863.36x = 213,736.32 × 87,816.96
  4. Step 4: Simplify right side
    154,863.36x = 18,769,673,863.99
  5. Step 5: Solve for x
    x = 18,769,673,863.99/154,863.36
  6. Step 6: Final answer
    x = 121,201.52

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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.