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Finding the Fourth Proportional to 192,779.88, 266,189.22 and 128,311.08

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Solution

The fourth proportional to 192,779.88, 266,189.22 and 128,311.08 is: 177,171.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,779.88 : 266,189.22 = 128,311.08 : x
  2. Step 2: Convert to fraction form
    192,779.88/266,189.22 = 128,311.08/x
  3. Step 3: Cross multiply
    192,779.88x = 266,189.22 × 128,311.08
  4. Step 4: Simplify right side
    192,779.88x = 34,155,026,302.56
  5. Step 5: Solve for x
    x = 34,155,026,302.56/192,779.88
  6. Step 6: Final answer
    x = 177,171.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.