Home / 193,780.87-290,606.64-81,440.16

Finding the Fourth Proportional to 193,780.87, 290,606.64 and 81,440.16

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Solution

The fourth proportional to 193,780.87, 290,606.64 and 81,440.16 is: 122,133.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    193,780.87 : 290,606.64 = 81,440.16 : x
  2. Step 2: Convert to fraction form
    193,780.87/290,606.64 = 81,440.16/x
  3. Step 3: Cross multiply
    193,780.87x = 290,606.64 × 81,440.16
  4. Step 4: Simplify right side
    193,780.87x = 23,667,051,258.66
  5. Step 5: Solve for x
    x = 23,667,051,258.66/193,780.87
  6. Step 6: Final answer
    x = 122,133.06

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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.