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Finding the Fourth Proportional to 263,750.40, 395,625.60 and 86,214.60

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Solution

The fourth proportional to 263,750.40, 395,625.60 and 86,214.60 is: 129,321.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,750.40 : 395,625.60 = 86,214.60 : x
  2. Step 2: Convert to fraction form
    263,750.40/395,625.60 = 86,214.60/x
  3. Step 3: Cross multiply
    263,750.40x = 395,625.60 × 86,214.60
  4. Step 4: Simplify right side
    263,750.40x = 34,108,702,853.76
  5. Step 5: Solve for x
    x = 34,108,702,853.76/263,750.40
  6. Step 6: Final answer
    x = 129,321.90

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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.