Home / 265,736.80-398,537.07-78,704.56

Finding the Fourth Proportional to 265,736.80, 398,537.07 and 78,704.56

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Solution

The fourth proportional to 265,736.80, 398,537.07 and 78,704.56 is: 118,036.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,736.80 : 398,537.07 = 78,704.56 : x
  2. Step 2: Convert to fraction form
    265,736.80/398,537.07 = 78,704.56/x
  3. Step 3: Cross multiply
    265,736.80x = 398,537.07 × 78,704.56
  4. Step 4: Simplify right side
    265,736.80x = 31,366,684,738.04
  5. Step 5: Solve for x
    x = 31,366,684,738.04/265,736.80
  6. Step 6: Final answer
    x = 118,036.66

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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.