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Finding the Fourth Proportional to 217,010.20, 325,515.30 and 142,360.60

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Solution

The fourth proportional to 217,010.20, 325,515.30 and 142,360.60 is: 213,540.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,010.20 : 325,515.30 = 142,360.60 : x
  2. Step 2: Convert to fraction form
    217,010.20/325,515.30 = 142,360.60/x
  3. Step 3: Cross multiply
    217,010.20x = 325,515.30 × 142,360.60
  4. Step 4: Simplify right side
    217,010.20x = 46,340,553,417.18
  5. Step 5: Solve for x
    x = 46,340,553,417.18/217,010.20
  6. Step 6: Final answer
    x = 213,540.90

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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.