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Finding the Fourth Proportional to 130,080.38, 194,965.25 and 66,930.75

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Solution

The fourth proportional to 130,080.38, 194,965.25 and 66,930.75 is: 100,316.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,080.38 : 194,965.25 = 66,930.75 : x
  2. Step 2: Convert to fraction form
    130,080.38/194,965.25 = 66,930.75/x
  3. Step 3: Cross multiply
    130,080.38x = 194,965.25 × 66,930.75
  4. Step 4: Simplify right side
    130,080.38x = 13,049,170,071.78
  5. Step 5: Solve for x
    x = 13,049,170,071.78/130,080.38
  6. Step 6: Final answer
    x = 100,316.21

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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.