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Finding the Fourth Proportional to 217,201.80, 325,818.90 and 76,942.20

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Solution

The fourth proportional to 217,201.80, 325,818.90 and 76,942.20 is: 115,419.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,201.80 : 325,818.90 = 76,942.20 : x
  2. Step 2: Convert to fraction form
    217,201.80/325,818.90 = 76,942.20/x
  3. Step 3: Cross multiply
    217,201.80x = 325,818.90 × 76,942.20
  4. Step 4: Simplify right side
    217,201.80x = 25,069,222,967.58
  5. Step 5: Solve for x
    x = 25,069,222,967.58/217,201.80
  6. Step 6: Final answer
    x = 115,419.04

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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.