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Finding the Fourth Proportional to 80,485.67, 120,846.99 and 45,016.48

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Solution

The fourth proportional to 80,485.67, 120,846.99 and 45,016.48 is: 67,590.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,485.67 : 120,846.99 = 45,016.48 : x
  2. Step 2: Convert to fraction form
    80,485.67/120,846.99 = 45,016.48/x
  3. Step 3: Cross multiply
    80,485.67x = 120,846.99 × 45,016.48
  4. Step 4: Simplify right side
    80,485.67x = 5,440,106,108.40
  5. Step 5: Solve for x
    x = 5,440,106,108.40/80,485.67
  6. Step 6: Final answer
    x = 67,590.99

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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.