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Finding the Fourth Proportional to 217,042.80, 325,175.40 and 133,839.60

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Solution

The fourth proportional to 217,042.80, 325,175.40 and 133,839.60 is: 200,519.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,042.80 : 325,175.40 = 133,839.60 : x
  2. Step 2: Convert to fraction form
    217,042.80/325,175.40 = 133,839.60/x
  3. Step 3: Cross multiply
    217,042.80x = 325,175.40 × 133,839.60
  4. Step 4: Simplify right side
    217,042.80x = 43,521,345,465.84
  5. Step 5: Solve for x
    x = 43,521,345,465.84/217,042.80
  6. Step 6: Final answer
    x = 200,519.65

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1.5x scale

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.