Home / 205,161.40-307,698.90-86,836.60

Finding the Fourth Proportional to 205,161.40, 307,698.90 and 86,836.60

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Solution

The fourth proportional to 205,161.40, 307,698.90 and 86,836.60 is: 130,236.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,161.40 : 307,698.90 = 86,836.60 : x
  2. Step 2: Convert to fraction form
    205,161.40/307,698.90 = 86,836.60/x
  3. Step 3: Cross multiply
    205,161.40x = 307,698.90 × 86,836.60
  4. Step 4: Simplify right side
    205,161.40x = 26,719,526,299.74
  5. Step 5: Solve for x
    x = 26,719,526,299.74/205,161.40
  6. Step 6: Final answer
    x = 130,236.62

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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.