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Finding the Fourth Proportional to 259,388.88, 389,050.56 and 69,864.36

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Solution

The fourth proportional to 259,388.88, 389,050.56 and 69,864.36 is: 104,787.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,388.88 : 389,050.56 = 69,864.36 : x
  2. Step 2: Convert to fraction form
    259,388.88/389,050.56 = 69,864.36/x
  3. Step 3: Cross multiply
    259,388.88x = 389,050.56 × 69,864.36
  4. Step 4: Simplify right side
    259,388.88x = 27,180,768,382.04
  5. Step 5: Solve for x
    x = 27,180,768,382.04/259,388.88
  6. Step 6: Final answer
    x = 104,787.72

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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.