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Finding the Fourth Proportional to 80,361.75, 120,542.63 and 31,113.75

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Solution

The fourth proportional to 80,361.75, 120,542.63 and 31,113.75 is: 46,670.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,361.75 : 120,542.63 = 31,113.75 : x
  2. Step 2: Convert to fraction form
    80,361.75/120,542.63 = 31,113.75/x
  3. Step 3: Cross multiply
    80,361.75x = 120,542.63 × 31,113.75
  4. Step 4: Simplify right side
    80,361.75x = 3,750,533,254.16
  5. Step 5: Solve for x
    x = 3,750,533,254.16/80,361.75
  6. Step 6: Final answer
    x = 46,670.63

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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.