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Finding the Fourth Proportional to 216,879.20, 325,221.60 and 98,489.60

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Solution

The fourth proportional to 216,879.20, 325,221.60 and 98,489.60 is: 147,690.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,879.20 : 325,221.60 = 98,489.60 : x
  2. Step 2: Convert to fraction form
    216,879.20/325,221.60 = 98,489.60/x
  3. Step 3: Cross multiply
    216,879.20x = 325,221.60 × 98,489.60
  4. Step 4: Simplify right side
    216,879.20x = 32,030,945,295.36
  5. Step 5: Solve for x
    x = 32,030,945,295.36/216,879.20
  6. Step 6: Final answer
    x = 147,690.26

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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.