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Finding the Fourth Proportional to 158,634.96, 218,916.54 and 87,015.56

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Solution

The fourth proportional to 158,634.96, 218,916.54 and 87,015.56 is: 120,081.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,634.96 : 218,916.54 = 87,015.56 : x
  2. Step 2: Convert to fraction form
    158,634.96/218,916.54 = 87,015.56/x
  3. Step 3: Cross multiply
    158,634.96x = 218,916.54 × 87,015.56
  4. Step 4: Simplify right side
    158,634.96x = 19,049,145,321.36
  5. Step 5: Solve for x
    x = 19,049,145,321.36/158,634.96
  6. Step 6: Final answer
    x = 120,081.63

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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.