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Finding the Fourth Proportional to 123,791.83, 170,912.11 and 85,094.01

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Solution

The fourth proportional to 123,791.83, 170,912.11 and 85,094.01 is: 117,484.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,791.83 : 170,912.11 = 85,094.01 : x
  2. Step 2: Convert to fraction form
    123,791.83/170,912.11 = 85,094.01/x
  3. Step 3: Cross multiply
    123,791.83x = 170,912.11 × 85,094.01
  4. Step 4: Simplify right side
    123,791.83x = 14,543,596,382.23
  5. Step 5: Solve for x
    x = 14,543,596,382.23/123,791.83
  6. Step 6: Final answer
    x = 117,484.30

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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.