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Finding the Fourth Proportional to 209,129.60, 288,600.68 and 113,636.30

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Solution

The fourth proportional to 209,129.60, 288,600.68 and 113,636.30 is: 156,819.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,129.60 : 288,600.68 = 113,636.30 : x
  2. Step 2: Convert to fraction form
    209,129.60/288,600.68 = 113,636.30/x
  3. Step 3: Cross multiply
    209,129.60x = 288,600.68 × 113,636.30
  4. Step 4: Simplify right side
    209,129.60x = 32,795,511,654.57
  5. Step 5: Solve for x
    x = 32,795,511,654.57/209,129.60
  6. Step 6: Final answer
    x = 156,819.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.