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Finding the Fourth Proportional to 77,291.32, 115,856.76 and 43,939.56

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Solution

The fourth proportional to 77,291.32, 115,856.76 and 43,939.56 is: 65,863.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,291.32 : 115,856.76 = 43,939.56 : x
  2. Step 2: Convert to fraction form
    77,291.32/115,856.76 = 43,939.56/x
  3. Step 3: Cross multiply
    77,291.32x = 115,856.76 × 43,939.56
  4. Step 4: Simplify right side
    77,291.32x = 5,090,695,057.43
  5. Step 5: Solve for x
    x = 5,090,695,057.43/77,291.32
  6. Step 6: Final answer
    x = 65,863.74

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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.