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Finding the Fourth Proportional to 276,659,781.70, 414,989,672.55 and 85,183,557.70

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Solution

The fourth proportional to 276,659,781.70, 414,989,672.55 and 85,183,557.70 is: 127,775,336.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,659,781.70 : 414,989,672.55 = 85,183,557.70 : x
  2. Step 2: Convert to fraction form
    276,659,781.70/414,989,672.55 = 85,183,557.70/x
  3. Step 3: Cross multiply
    276,659,781.70x = 414,989,672.55 × 85,183,557.70
  4. Step 4: Simplify right side
    276,659,781.70x = 35,350,296,716,567,032
  5. Step 5: Solve for x
    x = 35,350,296,716,567,032/276,659,781.70
  6. Step 6: Final answer
    x = 127,775,336.55

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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.