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Finding the Fourth Proportional to 260,736.60, 391,104.90 and 83,256.60

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Solution

The fourth proportional to 260,736.60, 391,104.90 and 83,256.60 is: 124,884.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,736.60 : 391,104.90 = 83,256.60 : x
  2. Step 2: Convert to fraction form
    260,736.60/391,104.90 = 83,256.60/x
  3. Step 3: Cross multiply
    260,736.60x = 391,104.90 × 83,256.60
  4. Step 4: Simplify right side
    260,736.60x = 32,562,064,217.34
  5. Step 5: Solve for x
    x = 32,562,064,217.34/260,736.60
  6. Step 6: Final answer
    x = 124,884.90

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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.