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Finding the Fourth Proportional to 259,847.80, 389,772.60 and 79,932.01

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Solution

The fourth proportional to 259,847.80, 389,772.60 and 79,932.01 is: 119,898.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,847.80 : 389,772.60 = 79,932.01 : x
  2. Step 2: Convert to fraction form
    259,847.80/389,772.60 = 79,932.01/x
  3. Step 3: Cross multiply
    259,847.80x = 389,772.60 × 79,932.01
  4. Step 4: Simplify right side
    259,847.80x = 31,155,307,360.93
  5. Step 5: Solve for x
    x = 31,155,307,360.93/259,847.80
  6. Step 6: Final answer
    x = 119,898.29

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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.