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Finding the Fourth Proportional to 259,376.61, 389,101.31 and 90,858.35

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Solution

The fourth proportional to 259,376.61, 389,101.31 and 90,858.35 is: 136,300.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,376.61 : 389,101.31 = 90,858.35 : x
  2. Step 2: Convert to fraction form
    259,376.61/389,101.31 = 90,858.35/x
  3. Step 3: Cross multiply
    259,376.61x = 389,101.31 × 90,858.35
  4. Step 4: Simplify right side
    259,376.61x = 35,353,103,009.44
  5. Step 5: Solve for x
    x = 35,353,103,009.44/259,376.61
  6. Step 6: Final answer
    x = 136,300.27

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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.