Home / 205,412.05-307,921.25-86,920.39

Finding the Fourth Proportional to 205,412.05, 307,921.25 and 86,920.39

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Solution

The fourth proportional to 205,412.05, 307,921.25 and 86,920.39 is: 130,297.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,412.05 : 307,921.25 = 86,920.39 : x
  2. Step 2: Convert to fraction form
    205,412.05/307,921.25 = 86,920.39/x
  3. Step 3: Cross multiply
    205,412.05x = 307,921.25 × 86,920.39
  4. Step 4: Simplify right side
    205,412.05x = 26,764,634,704.69
  5. Step 5: Solve for x
    x = 26,764,634,704.69/205,412.05
  6. Step 6: Final answer
    x = 130,297.30

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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.