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Finding the Fourth Proportional to 139,091.16, 191,944.44 and 75,427.86

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Solution

The fourth proportional to 139,091.16, 191,944.44 and 75,427.86 is: 104,089.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,091.16 : 191,944.44 = 75,427.86 : x
  2. Step 2: Convert to fraction form
    139,091.16/191,944.44 = 75,427.86/x
  3. Step 3: Cross multiply
    139,091.16x = 191,944.44 × 75,427.86
  4. Step 4: Simplify right side
    139,091.16x = 14,477,958,348.10
  5. Step 5: Solve for x
    x = 14,477,958,348.10/139,091.16
  6. Step 6: Final answer
    x = 104,089.71

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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.