Home / 85,186.20-127,779.30-76,891.80

Finding the Fourth Proportional to 85,186.20, 127,779.30 and 76,891.80

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Solution

The fourth proportional to 85,186.20, 127,779.30 and 76,891.80 is: 115,337.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,186.20 : 127,779.30 = 76,891.80 : x
  2. Step 2: Convert to fraction form
    85,186.20/127,779.30 = 76,891.80/x
  3. Step 3: Cross multiply
    85,186.20x = 127,779.30 × 76,891.80
  4. Step 4: Simplify right side
    85,186.20x = 9,825,180,379.74
  5. Step 5: Solve for x
    x = 9,825,180,379.74/85,186.20
  6. Step 6: Final answer
    x = 115,337.70

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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.