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Finding the Fourth Proportional to 159,185.82, 219,676.95 and 87,571.29

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Solution

The fourth proportional to 159,185.82, 219,676.95 and 87,571.29 is: 120,848.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,185.82 : 219,676.95 = 87,571.29 : x
  2. Step 2: Convert to fraction form
    159,185.82/219,676.95 = 87,571.29/x
  3. Step 3: Cross multiply
    159,185.82x = 219,676.95 × 87,571.29
  4. Step 4: Simplify right side
    159,185.82x = 19,237,393,894.77
  5. Step 5: Solve for x
    x = 19,237,393,894.77/159,185.82
  6. Step 6: Final answer
    x = 120,848.67

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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.