Home / 129,839.40-194,759.10-91,785.60

Finding the Fourth Proportional to 129,839.40, 194,759.10 and 91,785.60

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Solution

The fourth proportional to 129,839.40, 194,759.10 and 91,785.60 is: 137,678.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,839.40 : 194,759.10 = 91,785.60 : x
  2. Step 2: Convert to fraction form
    129,839.40/194,759.10 = 91,785.60/x
  3. Step 3: Cross multiply
    129,839.40x = 194,759.10 × 91,785.60
  4. Step 4: Simplify right side
    129,839.40x = 17,876,080,848.96
  5. Step 5: Solve for x
    x = 17,876,080,848.96/129,839.40
  6. Step 6: Final answer
    x = 137,678.40

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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.