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Finding the Fourth Proportional to 193,143.70, 290,043.60 and 143,280.10

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Solution

The fourth proportional to 193,143.70, 290,043.60 and 143,280.10 is: 215,163.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    193,143.70 : 290,043.60 = 143,280.10 : x
  2. Step 2: Convert to fraction form
    193,143.70/290,043.60 = 143,280.10/x
  3. Step 3: Cross multiply
    193,143.70x = 290,043.60 × 143,280.10
  4. Step 4: Simplify right side
    193,143.70x = 41,557,476,012.36
  5. Step 5: Solve for x
    x = 41,557,476,012.36/193,143.70
  6. Step 6: Final answer
    x = 215,163.51

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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.