Home / 128,935.80-193,394.79-40,180.86

Finding the Fourth Proportional to 128,935.80, 193,394.79 and 40,180.86

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Solution

The fourth proportional to 128,935.80, 193,394.79 and 40,180.86 is: 60,268.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,935.80 : 193,394.79 = 40,180.86 : x
  2. Step 2: Convert to fraction form
    128,935.80/193,394.79 = 40,180.86/x
  3. Step 3: Cross multiply
    128,935.80x = 193,394.79 × 40,180.86
  4. Step 4: Simplify right side
    128,935.80x = 7,770,768,981.72
  5. Step 5: Solve for x
    x = 7,770,768,981.72/128,935.80
  6. Step 6: Final answer
    x = 60,268.51

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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.