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Finding the Fourth Proportional to 190,567.87, 285,793.28 and 131,781.31

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Solution

The fourth proportional to 190,567.87, 285,793.28 and 131,781.31 is: 197,631.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,567.87 : 285,793.28 = 131,781.31 : x
  2. Step 2: Convert to fraction form
    190,567.87/285,793.28 = 131,781.31/x
  3. Step 3: Cross multiply
    190,567.87x = 285,793.28 × 131,781.31
  4. Step 4: Simplify right side
    190,567.87x = 37,662,210,739.72
  5. Step 5: Solve for x
    x = 37,662,210,739.72/190,567.87
  6. Step 6: Final answer
    x = 197,631.49

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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.