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Finding the Fourth Proportional to 80,919.50, 121,379.25 and 25,515.50

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Solution

The fourth proportional to 80,919.50, 121,379.25 and 25,515.50 is: 38,273.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,919.50 : 121,379.25 = 25,515.50 : x
  2. Step 2: Convert to fraction form
    80,919.50/121,379.25 = 25,515.50/x
  3. Step 3: Cross multiply
    80,919.50x = 121,379.25 × 25,515.50
  4. Step 4: Simplify right side
    80,919.50x = 3,097,052,253.38
  5. Step 5: Solve for x
    x = 3,097,052,253.38/80,919.50
  6. Step 6: Final answer
    x = 38,273.25

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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.