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Finding the Fourth Proportional to 140,361.56, 193,643.96 and 86,553.16

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Solution

The fourth proportional to 140,361.56, 193,643.96 and 86,553.16 is: 119,409.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,361.56 : 193,643.96 = 86,553.16 : x
  2. Step 2: Convert to fraction form
    140,361.56/193,643.96 = 86,553.16/x
  3. Step 3: Cross multiply
    140,361.56x = 193,643.96 × 86,553.16
  4. Step 4: Simplify right side
    140,361.56x = 16,760,496,652.91
  5. Step 5: Solve for x
    x = 16,760,496,652.91/140,361.56
  6. Step 6: Final answer
    x = 119,409.45

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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.