Home / 259,787.20-389,583.60-91,242.40

Finding the Fourth Proportional to 259,787.20, 389,583.60 and 91,242.40

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Solution

The fourth proportional to 259,787.20, 389,583.60 and 91,242.40 is: 136,829.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,787.20 : 389,583.60 = 91,242.40 : x
  2. Step 2: Convert to fraction form
    259,787.20/389,583.60 = 91,242.40/x
  3. Step 3: Cross multiply
    259,787.20x = 389,583.60 × 91,242.40
  4. Step 4: Simplify right side
    259,787.20x = 35,546,542,664.64
  5. Step 5: Solve for x
    x = 35,546,542,664.64/259,787.20
  6. Step 6: Final answer
    x = 136,829.46

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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.