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Finding the Fourth Proportional to 201,992,760.69, 278,749,883.76 and 109,173,268.53

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Solution

The fourth proportional to 201,992,760.69, 278,749,883.76 and 109,173,268.53 is: 150,659,042.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,992,760.69 : 278,749,883.76 = 109,173,268.53 : x
  2. Step 2: Convert to fraction form
    201,992,760.69/278,749,883.76 = 109,173,268.53/x
  3. Step 3: Cross multiply
    201,992,760.69x = 278,749,883.76 × 109,173,268.53
  4. Step 4: Simplify right side
    201,992,760.69x = 30,432,035,912,436,764
  5. Step 5: Solve for x
    x = 30,432,035,912,436,764/201,992,760.69
  6. Step 6: Final answer
    x = 150,659,042.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.