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Finding the Fourth Proportional to 159,334.92, 219,888.45 and 87,721.61

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Solution

The fourth proportional to 159,334.92, 219,888.45 and 87,721.61 is: 121,059.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,334.92 : 219,888.45 = 87,721.61 : x
  2. Step 2: Convert to fraction form
    159,334.92/219,888.45 = 87,721.61/x
  3. Step 3: Cross multiply
    159,334.92x = 219,888.45 × 87,721.61
  4. Step 4: Simplify right side
    159,334.92x = 19,288,967,754.96
  5. Step 5: Solve for x
    x = 19,288,967,754.96/159,334.92
  6. Step 6: Final answer
    x = 121,059.26

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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.