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Finding the Fourth Proportional to 159,388.14, 219,955.65 and 87,767.97

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Solution

The fourth proportional to 159,388.14, 219,955.65 and 87,767.97 is: 121,119.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,388.14 : 219,955.65 = 87,767.97 : x
  2. Step 2: Convert to fraction form
    159,388.14/219,955.65 = 87,767.97/x
  3. Step 3: Cross multiply
    159,388.14x = 219,955.65 × 87,767.97
  4. Step 4: Simplify right side
    159,388.14x = 19,305,060,890.53
  5. Step 5: Solve for x
    x = 19,305,060,890.53/159,388.14
  6. Step 6: Final answer
    x = 121,119.81

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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.