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Finding the Fourth Proportional to 231,086.40, 346,629.60 and 81,495.60

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Solution

The fourth proportional to 231,086.40, 346,629.60 and 81,495.60 is: 122,243.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,086.40 : 346,629.60 = 81,495.60 : x
  2. Step 2: Convert to fraction form
    231,086.40/346,629.60 = 81,495.60/x
  3. Step 3: Cross multiply
    231,086.40x = 346,629.60 × 81,495.60
  4. Step 4: Simplify right side
    231,086.40x = 28,248,787,229.76
  5. Step 5: Solve for x
    x = 28,248,787,229.76/231,086.40
  6. Step 6: Final answer
    x = 122,243.40

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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.