Home / 100,789.86-139,091.06-57,768.43

Finding the Fourth Proportional to 100,789.86, 139,091.06 and 57,768.43

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Solution

The fourth proportional to 100,789.86, 139,091.06 and 57,768.43 is: 79,721.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,789.86 : 139,091.06 = 57,768.43 : x
  2. Step 2: Convert to fraction form
    100,789.86/139,091.06 = 57,768.43/x
  3. Step 3: Cross multiply
    100,789.86x = 139,091.06 × 57,768.43
  4. Step 4: Simplify right side
    100,789.86x = 8,035,072,163.24
  5. Step 5: Solve for x
    x = 8,035,072,163.24/100,789.86
  6. Step 6: Final answer
    x = 79,721.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.