Home / 66,919.28-100,378.84-20,172.15

Finding the Fourth Proportional to 66,919.28, 100,378.84 and 20,172.15

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Solution

The fourth proportional to 66,919.28, 100,378.84 and 20,172.15 is: 30,258.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,919.28 : 100,378.84 = 20,172.15 : x
  2. Step 2: Convert to fraction form
    66,919.28/100,378.84 = 20,172.15/x
  3. Step 3: Cross multiply
    66,919.28x = 100,378.84 × 20,172.15
  4. Step 4: Simplify right side
    66,919.28x = 2,024,857,017.31
  5. Step 5: Solve for x
    x = 2,024,857,017.31/66,919.28
  6. Step 6: Final answer
    x = 30,258.20

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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.