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Finding the Fourth Proportional to 259,011.78, 388,566.88 and 90,579.98

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Solution

The fourth proportional to 259,011.78, 388,566.88 and 90,579.98 is: 135,887.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,011.78 : 388,566.88 = 90,579.98 : x
  2. Step 2: Convert to fraction form
    259,011.78/388,566.88 = 90,579.98/x
  3. Step 3: Cross multiply
    259,011.78x = 388,566.88 × 90,579.98
  4. Step 4: Simplify right side
    259,011.78x = 35,196,380,219.06
  5. Step 5: Solve for x
    x = 35,196,380,219.06/259,011.78
  6. Step 6: Final answer
    x = 135,887.18

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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.