Home / 128,815.43-193,255.85-40,069.60

Finding the Fourth Proportional to 128,815.43, 193,255.85 and 40,069.60

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Solution

The fourth proportional to 128,815.43, 193,255.85 and 40,069.60 is: 60,114.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,815.43 : 193,255.85 = 40,069.60 : x
  2. Step 2: Convert to fraction form
    128,815.43/193,255.85 = 40,069.60/x
  3. Step 3: Cross multiply
    128,815.43x = 193,255.85 × 40,069.60
  4. Step 4: Simplify right side
    128,815.43x = 7,743,684,406.81
  5. Step 5: Solve for x
    x = 7,743,684,406.81/128,815.43
  6. Step 6: Final answer
    x = 60,114.57

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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.