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Finding the Fourth Proportional to 138,593.52, 191,288.73 and 87,573.86

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Solution

The fourth proportional to 138,593.52, 191,288.73 and 87,573.86 is: 120,870.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,593.52 : 191,288.73 = 87,573.86 : x
  2. Step 2: Convert to fraction form
    138,593.52/191,288.73 = 87,573.86/x
  3. Step 3: Cross multiply
    138,593.52x = 191,288.73 × 87,573.86
  4. Step 4: Simplify right side
    138,593.52x = 16,751,891,504.15
  5. Step 5: Solve for x
    x = 16,751,891,504.15/138,593.52
  6. Step 6: Final answer
    x = 120,870.67

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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.