Home / 81,423.60-122,135.40-68,301.60

Finding the Fourth Proportional to 81,423.60, 122,135.40 and 68,301.60

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Solution

The fourth proportional to 81,423.60, 122,135.40 and 68,301.60 is: 102,452.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,423.60 : 122,135.40 = 68,301.60 : x
  2. Step 2: Convert to fraction form
    81,423.60/122,135.40 = 68,301.60/x
  3. Step 3: Cross multiply
    81,423.60x = 122,135.40 × 68,301.60
  4. Step 4: Simplify right side
    81,423.60x = 8,342,043,236.64
  5. Step 5: Solve for x
    x = 8,342,043,236.64/81,423.60
  6. Step 6: Final answer
    x = 102,452.40

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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.