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Finding the Fourth Proportional to 50,709,826.45, 69,978,873.81 and 28,382,805.86

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Solution

The fourth proportional to 50,709,826.45, 69,978,873.81 and 28,382,805.86 is: 39,167,887.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,709,826.45 : 69,978,873.81 = 28,382,805.86 : x
  2. Step 2: Convert to fraction form
    50,709,826.45/69,978,873.81 = 28,382,805.86/x
  3. Step 3: Cross multiply
    50,709,826.45x = 69,978,873.81 × 28,382,805.86
  4. Step 4: Simplify right side
    50,709,826.45x = 1,986,196,789,621,177.50
  5. Step 5: Solve for x
    x = 1,986,196,789,621,177.50/50,709,826.45
  6. Step 6: Final answer
    x = 39,167,887.74

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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.