Home / 209,135.12-288,726.53-137,723.09

Finding the Fourth Proportional to 209,135.12, 288,726.53 and 137,723.09

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Solution

The fourth proportional to 209,135.12, 288,726.53 and 137,723.09 is: 190,136.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,135.12 : 288,726.53 = 137,723.09 : x
  2. Step 2: Convert to fraction form
    209,135.12/288,726.53 = 137,723.09/x
  3. Step 3: Cross multiply
    209,135.12x = 288,726.53 × 137,723.09
  4. Step 4: Simplify right side
    209,135.12x = 39,764,307,744.33
  5. Step 5: Solve for x
    x = 39,764,307,744.33/209,135.12
  6. Step 6: Final answer
    x = 190,136.93

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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.