Home / 209,519.09-314,276.94-138,758.40

Finding the Fourth Proportional to 209,519.09, 314,276.94 and 138,758.40

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Solution

The fourth proportional to 209,519.09, 314,276.94 and 138,758.40 is: 208,136.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,519.09 : 314,276.94 = 138,758.40 : x
  2. Step 2: Convert to fraction form
    209,519.09/314,276.94 = 138,758.40/x
  3. Step 3: Cross multiply
    209,519.09x = 314,276.94 × 138,758.40
  4. Step 4: Simplify right side
    209,519.09x = 43,608,565,351.30
  5. Step 5: Solve for x
    x = 43,608,565,351.30/209,519.09
  6. Step 6: Final answer
    x = 208,136.48

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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.