Home / 77,977.45-116,965.09-18,812.62

Finding the Fourth Proportional to 77,977.45, 116,965.09 and 18,812.62

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Solution

The fourth proportional to 77,977.45, 116,965.09 and 18,812.62 is: 28,218.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,977.45 : 116,965.09 = 18,812.62 : x
  2. Step 2: Convert to fraction form
    77,977.45/116,965.09 = 18,812.62/x
  3. Step 3: Cross multiply
    77,977.45x = 116,965.09 × 18,812.62
  4. Step 4: Simplify right side
    77,977.45x = 2,200,419,791.44
  5. Step 5: Solve for x
    x = 2,200,419,791.44/77,977.45
  6. Step 6: Final answer
    x = 28,218.67

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1.5x scale

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.