Home / 258,782.95-387,943.57-100,974.70

Finding the Fourth Proportional to 258,782.95, 387,943.57 and 100,974.70

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Solution

The fourth proportional to 258,782.95, 387,943.57 and 100,974.70 is: 151,371.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,782.95 : 387,943.57 = 100,974.70 : x
  2. Step 2: Convert to fraction form
    258,782.95/387,943.57 = 100,974.70/x
  3. Step 3: Cross multiply
    258,782.95x = 387,943.57 × 100,974.70
  4. Step 4: Simplify right side
    258,782.95x = 39,172,485,597.68
  5. Step 5: Solve for x
    x = 39,172,485,597.68/258,782.95
  6. Step 6: Final answer
    x = 151,371.97

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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.