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Finding the Fourth Proportional to 156,524.31, 215,972.04 and 99,186.03

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Solution

The fourth proportional to 156,524.31, 215,972.04 and 99,186.03 is: 136,856.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,524.31 : 215,972.04 = 99,186.03 : x
  2. Step 2: Convert to fraction form
    156,524.31/215,972.04 = 99,186.03/x
  3. Step 3: Cross multiply
    156,524.31x = 215,972.04 × 99,186.03
  4. Step 4: Simplify right side
    156,524.31x = 21,421,409,238.60
  5. Step 5: Solve for x
    x = 21,421,409,238.60/156,524.31
  6. Step 6: Final answer
    x = 136,856.76

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.