Home / 129,615.20-194,307.60-85,263.20

Finding the Fourth Proportional to 129,615.20, 194,307.60 and 85,263.20

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Solution

The fourth proportional to 129,615.20, 194,307.60 and 85,263.20 is: 127,819.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,615.20 : 194,307.60 = 85,263.20 : x
  2. Step 2: Convert to fraction form
    129,615.20/194,307.60 = 85,263.20/x
  3. Step 3: Cross multiply
    129,615.20x = 194,307.60 × 85,263.20
  4. Step 4: Simplify right side
    129,615.20x = 16,567,287,760.32
  5. Step 5: Solve for x
    x = 16,567,287,760.32/129,615.20
  6. Step 6: Final answer
    x = 127,819.02

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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.