Home / 217,819.80-326,729.70-129,027.60

Finding the Fourth Proportional to 217,819.80, 326,729.70 and 129,027.60

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Solution

The fourth proportional to 217,819.80, 326,729.70 and 129,027.60 is: 193,541.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,819.80 : 326,729.70 = 129,027.60 : x
  2. Step 2: Convert to fraction form
    217,819.80/326,729.70 = 129,027.60/x
  3. Step 3: Cross multiply
    217,819.80x = 326,729.70 × 129,027.60
  4. Step 4: Simplify right side
    217,819.80x = 42,157,149,039.72
  5. Step 5: Solve for x
    x = 42,157,149,039.72/217,819.80
  6. Step 6: Final answer
    x = 193,541.40

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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.