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Finding the Fourth Proportional to 218,930.80, 328,396.20 and 125,359.60

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Solution

The fourth proportional to 218,930.80, 328,396.20 and 125,359.60 is: 188,039.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,930.80 : 328,396.20 = 125,359.60 : x
  2. Step 2: Convert to fraction form
    218,930.80/328,396.20 = 125,359.60/x
  3. Step 3: Cross multiply
    218,930.80x = 328,396.20 × 125,359.60
  4. Step 4: Simplify right side
    218,930.80x = 41,167,616,273.52
  5. Step 5: Solve for x
    x = 41,167,616,273.52/218,930.80
  6. Step 6: Final answer
    x = 188,039.40

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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.