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Finding the Fourth Proportional to 73,219.80, 109,829.49 and 20,629.15

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Solution

The fourth proportional to 73,219.80, 109,829.49 and 20,629.15 is: 30,943.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,219.80 : 109,829.49 = 20,629.15 : x
  2. Step 2: Convert to fraction form
    73,219.80/109,829.49 = 20,629.15/x
  3. Step 3: Cross multiply
    73,219.80x = 109,829.49 × 20,629.15
  4. Step 4: Simplify right side
    73,219.80x = 2,265,689,023.63
  5. Step 5: Solve for x
    x = 2,265,689,023.63/73,219.80
  6. Step 6: Final answer
    x = 30,943.67

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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.