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Finding the Fourth Proportional to 259,473.54, 389,208 and 81,980.52

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Solution

The fourth proportional to 259,473.54, 389,208 and 81,980.52 is: 122,970.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,473.54 : 389,208 = 81,980.52 : x
  2. Step 2: Convert to fraction form
    259,473.54/389,208 = 81,980.52/x
  3. Step 3: Cross multiply
    259,473.54x = 389,208 × 81,980.52
  4. Step 4: Simplify right side
    259,473.54x = 31,907,474,228.16
  5. Step 5: Solve for x
    x = 31,907,474,228.16/259,473.54
  6. Step 6: Final answer
    x = 122,970.05

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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.