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Finding the Fourth Proportional to 259,009.78, 388,563.88 and 90,577.98

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Solution

The fourth proportional to 259,009.78, 388,563.88 and 90,577.98 is: 135,884.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,009.78 : 388,563.88 = 90,577.98 : x
  2. Step 2: Convert to fraction form
    259,009.78/388,563.88 = 90,577.98/x
  3. Step 3: Cross multiply
    259,009.78x = 388,563.88 × 90,577.98
  4. Step 4: Simplify right side
    259,009.78x = 35,195,331,351.36
  5. Step 5: Solve for x
    x = 35,195,331,351.36/259,009.78
  6. Step 6: Final answer
    x = 135,884.18

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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.