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Finding the Fourth Proportional to 208,930.26, 288,303.90 and 128,344.77

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Solution

The fourth proportional to 208,930.26, 288,303.90 and 128,344.77 is: 177,103.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,930.26 : 288,303.90 = 128,344.77 : x
  2. Step 2: Convert to fraction form
    208,930.26/288,303.90 = 128,344.77/x
  3. Step 3: Cross multiply
    208,930.26x = 288,303.90 × 128,344.77
  4. Step 4: Simplify right side
    208,930.26x = 37,002,297,735.60
  5. Step 5: Solve for x
    x = 37,002,297,735.60/208,930.26
  6. Step 6: Final answer
    x = 177,103.58

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1.5x scale

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.