Home / 209,907.07-314,705.09-126,781.63

Finding the Fourth Proportional to 209,907.07, 314,705.09 and 126,781.63

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Solution

The fourth proportional to 209,907.07, 314,705.09 and 126,781.63 is: 190,078.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,907.07 : 314,705.09 = 126,781.63 : x
  2. Step 2: Convert to fraction form
    209,907.07/314,705.09 = 126,781.63/x
  3. Step 3: Cross multiply
    209,907.07x = 314,705.09 × 126,781.63
  4. Step 4: Simplify right side
    209,907.07x = 39,898,823,645.59
  5. Step 5: Solve for x
    x = 39,898,823,645.59/209,907.07
  6. Step 6: Final answer
    x = 190,078.51

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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.