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Finding the Fourth Proportional to 201,992,758.76, 278,749,881.09 and 109,173,266.60

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Solution

The fourth proportional to 201,992,758.76, 278,749,881.09 and 109,173,266.60 is: 150,659,039.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,992,758.76 : 278,749,881.09 = 109,173,266.60 : x
  2. Step 2: Convert to fraction form
    201,992,758.76/278,749,881.09 = 109,173,266.60/x
  3. Step 3: Cross multiply
    201,992,758.76x = 278,749,881.09 × 109,173,266.60
  4. Step 4: Simplify right side
    201,992,758.76x = 30,432,035,082,956,864
  5. Step 5: Solve for x
    x = 30,432,035,082,956,864/201,992,758.76
  6. Step 6: Final answer
    x = 150,659,039.81

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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.