Home / 268,268.86-402,465.48-78,721.54

Finding the Fourth Proportional to 268,268.86, 402,465.48 and 78,721.54

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Solution

The fourth proportional to 268,268.86, 402,465.48 and 78,721.54 is: 118,100.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,268.86 : 402,465.48 = 78,721.54 : x
  2. Step 2: Convert to fraction form
    268,268.86/402,465.48 = 78,721.54/x
  3. Step 3: Cross multiply
    268,268.86x = 402,465.48 × 78,721.54
  4. Step 4: Simplify right side
    268,268.86x = 31,682,702,382.44
  5. Step 5: Solve for x
    x = 31,682,702,382.44/268,268.86
  6. Step 6: Final answer
    x = 118,100.56

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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.