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Finding the Fourth Proportional to 159,329.50, 219,889.35 and 87,724.06

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Solution

The fourth proportional to 159,329.50, 219,889.35 and 87,724.06 is: 121,067.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,329.50 : 219,889.35 = 87,724.06 : x
  2. Step 2: Convert to fraction form
    159,329.50/219,889.35 = 87,724.06/x
  3. Step 3: Cross multiply
    159,329.50x = 219,889.35 × 87,724.06
  4. Step 4: Simplify right side
    159,329.50x = 19,289,586,532.76
  5. Step 5: Solve for x
    x = 19,289,586,532.76/159,329.50
  6. Step 6: Final answer
    x = 121,067.26

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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.