Home / 139,039.74-208,568.12-39,208.66

Finding the Fourth Proportional to 139,039.74, 208,568.12 and 39,208.66

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Solution

The fourth proportional to 139,039.74, 208,568.12 and 39,208.66 is: 58,815.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,039.74 : 208,568.12 = 39,208.66 : x
  2. Step 2: Convert to fraction form
    139,039.74/208,568.12 = 39,208.66/x
  3. Step 3: Cross multiply
    139,039.74x = 208,568.12 × 39,208.66
  4. Step 4: Simplify right side
    139,039.74x = 8,177,675,786.46
  5. Step 5: Solve for x
    x = 8,177,675,786.46/139,039.74
  6. Step 6: Final answer
    x = 58,815.38

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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.