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Finding the Fourth Proportional to 6,665,945.94, 9,999,437.31 and 2,178,675.54

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Solution

The fourth proportional to 6,665,945.94, 9,999,437.31 and 2,178,675.54 is: 3,268,182.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,665,945.94 : 9,999,437.31 = 2,178,675.54 : x
  2. Step 2: Convert to fraction form
    6,665,945.94/9,999,437.31 = 2,178,675.54/x
  3. Step 3: Cross multiply
    6,665,945.94x = 9,999,437.31 × 2,178,675.54
  4. Step 4: Simplify right side
    6,665,945.94x = 21,785,529,481,060.40
  5. Step 5: Solve for x
    x = 21,785,529,481,060.40/6,665,945.94
  6. Step 6: Final answer
    x = 3,268,182.74

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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.