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Finding the Fourth Proportional to 291,434.82, 437,153.01 and 81,072.78

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Solution

The fourth proportional to 291,434.82, 437,153.01 and 81,072.78 is: 121,609.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,434.82 : 437,153.01 = 81,072.78 : x
  2. Step 2: Convert to fraction form
    291,434.82/437,153.01 = 81,072.78/x
  3. Step 3: Cross multiply
    291,434.82x = 437,153.01 × 81,072.78
  4. Step 4: Simplify right side
    291,434.82x = 35,441,209,806.07
  5. Step 5: Solve for x
    x = 35,441,209,806.07/291,434.82
  6. Step 6: Final answer
    x = 121,609.39

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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.