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Finding the Fourth Proportional to 85,189.86, 127,784.79 and 53,959.50

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Solution

The fourth proportional to 85,189.86, 127,784.79 and 53,959.50 is: 80,939.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,189.86 : 127,784.79 = 53,959.50 : x
  2. Step 2: Convert to fraction form
    85,189.86/127,784.79 = 53,959.50/x
  3. Step 3: Cross multiply
    85,189.86x = 127,784.79 × 53,959.50
  4. Step 4: Simplify right side
    85,189.86x = 6,895,203,376.01
  5. Step 5: Solve for x
    x = 6,895,203,376.01/85,189.86
  6. Step 6: Final answer
    x = 80,939.25

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Double scale
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Similar ratio
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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.