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Finding the Fourth Proportional to 80,121.81, 120,173.54 and 20,963.19

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Solution

The fourth proportional to 80,121.81, 120,173.54 and 20,963.19 is: 31,442.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,121.81 : 120,173.54 = 20,963.19 : x
  2. Step 2: Convert to fraction form
    80,121.81/120,173.54 = 20,963.19/x
  3. Step 3: Cross multiply
    80,121.81x = 120,173.54 × 20,963.19
  4. Step 4: Simplify right side
    80,121.81x = 2,519,220,647.18
  5. Step 5: Solve for x
    x = 2,519,220,647.18/80,121.81
  6. Step 6: Final answer
    x = 31,442.38

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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.