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Finding the Fourth Proportional to 139,027.25, 191,864.01 and 78,600.44

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Solution

The fourth proportional to 139,027.25, 191,864.01 and 78,600.44 is: 108,472.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,027.25 : 191,864.01 = 78,600.44 : x
  2. Step 2: Convert to fraction form
    139,027.25/191,864.01 = 78,600.44/x
  3. Step 3: Cross multiply
    139,027.25x = 191,864.01 × 78,600.44
  4. Step 4: Simplify right side
    139,027.25x = 15,080,595,606.16
  5. Step 5: Solve for x
    x = 15,080,595,606.16/139,027.25
  6. Step 6: Final answer
    x = 108,472.23

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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.