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Finding the Fourth Proportional to 87,930.70, 131,894.87 and 21,370.64

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Solution

The fourth proportional to 87,930.70, 131,894.87 and 21,370.64 is: 32,055.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,930.70 : 131,894.87 = 21,370.64 : x
  2. Step 2: Convert to fraction form
    87,930.70/131,894.87 = 21,370.64/x
  3. Step 3: Cross multiply
    87,930.70x = 131,894.87 × 21,370.64
  4. Step 4: Simplify right side
    87,930.70x = 2,818,677,018.29
  5. Step 5: Solve for x
    x = 2,818,677,018.29/87,930.70
  6. Step 6: Final answer
    x = 32,055.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.