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Finding the Fourth Proportional to 129,851.40, 194,777.10 and 121,978.20

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Solution

The fourth proportional to 129,851.40, 194,777.10 and 121,978.20 is: 182,967.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,851.40 : 194,777.10 = 121,978.20 : x
  2. Step 2: Convert to fraction form
    129,851.40/194,777.10 = 121,978.20/x
  3. Step 3: Cross multiply
    129,851.40x = 194,777.10 × 121,978.20
  4. Step 4: Simplify right side
    129,851.40x = 23,758,560,059.22
  5. Step 5: Solve for x
    x = 23,758,560,059.22/129,851.40
  6. Step 6: Final answer
    x = 182,967.30

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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.