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Finding the Fourth Proportional to 193,395.20, 290,106.36 and 80,961.93

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Solution

The fourth proportional to 193,395.20, 290,106.36 and 80,961.93 is: 121,448.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    193,395.20 : 290,106.36 = 80,961.93 : x
  2. Step 2: Convert to fraction form
    193,395.20/290,106.36 = 80,961.93/x
  3. Step 3: Cross multiply
    193,395.20x = 290,106.36 × 80,961.93
  4. Step 4: Simplify right side
    193,395.20x = 23,487,570,810.87
  5. Step 5: Solve for x
    x = 23,487,570,810.87/193,395.20
  6. Step 6: Final answer
    x = 121,448.57

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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.