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Finding the Fourth Proportional to 100,873.60, 151,310.40 and 85,321.60

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Solution

The fourth proportional to 100,873.60, 151,310.40 and 85,321.60 is: 127,982.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,873.60 : 151,310.40 = 85,321.60 : x
  2. Step 2: Convert to fraction form
    100,873.60/151,310.40 = 85,321.60/x
  3. Step 3: Cross multiply
    100,873.60x = 151,310.40 × 85,321.60
  4. Step 4: Simplify right side
    100,873.60x = 12,910,045,424.64
  5. Step 5: Solve for x
    x = 12,910,045,424.64/100,873.60
  6. Step 6: Final answer
    x = 127,982.40

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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.