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Finding the Fourth Proportional to 259,511.79, 389,128.94 and 133,100.45

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Solution

The fourth proportional to 259,511.79, 389,128.94 and 133,100.45 is: 199,579.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,511.79 : 389,128.94 = 133,100.45 : x
  2. Step 2: Convert to fraction form
    259,511.79/389,128.94 = 133,100.45/x
  3. Step 3: Cross multiply
    259,511.79x = 389,128.94 × 133,100.45
  4. Step 4: Simplify right side
    259,511.79x = 51,793,237,022.02
  5. Step 5: Solve for x
    x = 51,793,237,022.02/259,511.79
  6. Step 6: Final answer
    x = 199,579.51

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1.5x scale

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.