Home / 80,048.28-120,072.42-30,139.57

Finding the Fourth Proportional to 80,048.28, 120,072.42 and 30,139.57

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Solution

The fourth proportional to 80,048.28, 120,072.42 and 30,139.57 is: 45,209.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,048.28 : 120,072.42 = 30,139.57 : x
  2. Step 2: Convert to fraction form
    80,048.28/120,072.42 = 30,139.57/x
  3. Step 3: Cross multiply
    80,048.28x = 120,072.42 × 30,139.57
  4. Step 4: Simplify right side
    80,048.28x = 3,618,931,257.75
  5. Step 5: Solve for x
    x = 3,618,931,257.75/80,048.28
  6. Step 6: Final answer
    x = 45,209.35

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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.