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Finding the Fourth Proportional to 111,181.40, 166,512.90 and 75,930.20

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Solution

The fourth proportional to 111,181.40, 166,512.90 and 75,930.20 is: 113,718.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,181.40 : 166,512.90 = 75,930.20 : x
  2. Step 2: Convert to fraction form
    111,181.40/166,512.90 = 75,930.20/x
  3. Step 3: Cross multiply
    111,181.40x = 166,512.90 × 75,930.20
  4. Step 4: Simplify right side
    111,181.40x = 12,643,357,799.58
  5. Step 5: Solve for x
    x = 12,643,357,799.58/111,181.40
  6. Step 6: Final answer
    x = 113,718.28

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1.5x scale

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.