Home / 78,947.11-109,019.75-50,702

Finding the Fourth Proportional to 78,947.11, 109,019.75 and 50,702

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Solution

The fourth proportional to 78,947.11, 109,019.75 and 50,702 is: 70,015.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,947.11 : 109,019.75 = 50,702 : x
  2. Step 2: Convert to fraction form
    78,947.11/109,019.75 = 50,702/x
  3. Step 3: Cross multiply
    78,947.11x = 109,019.75 × 50,702
  4. Step 4: Simplify right side
    78,947.11x = 5,527,519,110.99
  5. Step 5: Solve for x
    x = 5,527,519,110.99/78,947.11
  6. Step 6: Final answer
    x = 70,015.48

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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.