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Finding the Fourth Proportional to 139,027.39, 191,864.18 and 78,600.58

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Solution

The fourth proportional to 139,027.39, 191,864.18 and 78,600.58 is: 108,472.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,027.39 : 191,864.18 = 78,600.58 : x
  2. Step 2: Convert to fraction form
    139,027.39/191,864.18 = 78,600.58/x
  3. Step 3: Cross multiply
    139,027.39x = 191,864.18 × 78,600.58
  4. Step 4: Simplify right side
    139,027.39x = 15,080,635,546.07
  5. Step 5: Solve for x
    x = 15,080,635,546.07/139,027.39
  6. Step 6: Final answer
    x = 108,472.41

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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.