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Finding the Fourth Proportional to 259,455.54, 389,151.11 and 69,930.72

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Solution

The fourth proportional to 259,455.54, 389,151.11 and 69,930.72 is: 104,887.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,455.54 : 389,151.11 = 69,930.72 : x
  2. Step 2: Convert to fraction form
    259,455.54/389,151.11 = 69,930.72/x
  3. Step 3: Cross multiply
    259,455.54x = 389,151.11 × 69,930.72
  4. Step 4: Simplify right side
    259,455.54x = 27,213,616,961.45
  5. Step 5: Solve for x
    x = 27,213,616,961.45/259,455.54
  6. Step 6: Final answer
    x = 104,887.40

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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.