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Finding the Fourth Proportional to 217,219.80, 325,829.70 and 104,986.20

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Solution

The fourth proportional to 217,219.80, 325,829.70 and 104,986.20 is: 157,479.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,219.80 : 325,829.70 = 104,986.20 : x
  2. Step 2: Convert to fraction form
    217,219.80/325,829.70 = 104,986.20/x
  3. Step 3: Cross multiply
    217,219.80x = 325,829.70 × 104,986.20
  4. Step 4: Simplify right side
    217,219.80x = 34,207,622,050.14
  5. Step 5: Solve for x
    x = 34,207,622,050.14/217,219.80
  6. Step 6: Final answer
    x = 157,479.30

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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.