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Finding the Fourth Proportional to 190,997.65, 287,606.25 and 141,428.89

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Solution

The fourth proportional to 190,997.65, 287,606.25 and 141,428.89 is: 212,965.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,997.65 : 287,606.25 = 141,428.89 : x
  2. Step 2: Convert to fraction form
    190,997.65/287,606.25 = 141,428.89/x
  3. Step 3: Cross multiply
    190,997.65x = 287,606.25 × 141,428.89
  4. Step 4: Simplify right side
    190,997.65x = 40,675,832,694.56
  5. Step 5: Solve for x
    x = 40,675,832,694.56/190,997.65
  6. Step 6: Final answer
    x = 212,965.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.