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Finding the Fourth Proportional to 68,990.30, 103,485.45 and 50,400.80

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Solution

The fourth proportional to 68,990.30, 103,485.45 and 50,400.80 is: 75,601.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,990.30 : 103,485.45 = 50,400.80 : x
  2. Step 2: Convert to fraction form
    68,990.30/103,485.45 = 50,400.80/x
  3. Step 3: Cross multiply
    68,990.30x = 103,485.45 × 50,400.80
  4. Step 4: Simplify right side
    68,990.30x = 5,215,749,468.36
  5. Step 5: Solve for x
    x = 5,215,749,468.36/68,990.30
  6. Step 6: Final answer
    x = 75,601.20

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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.