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Finding the Fourth Proportional to 181,690.84, 251,017.75 and 138,820.38

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Solution

The fourth proportional to 181,690.84, 251,017.75 and 138,820.38 is: 191,789.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    181,690.84 : 251,017.75 = 138,820.38 : x
  2. Step 2: Convert to fraction form
    181,690.84/251,017.75 = 138,820.38/x
  3. Step 3: Cross multiply
    181,690.84x = 251,017.75 × 138,820.38
  4. Step 4: Simplify right side
    181,690.84x = 34,846,378,186.66
  5. Step 5: Solve for x
    x = 34,846,378,186.66/181,690.84
  6. Step 6: Final answer
    x = 191,789.41

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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.