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Finding the Fourth Proportional to 138,776.37, 191,516.01 and 85,051.01

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Solution

The fourth proportional to 138,776.37, 191,516.01 and 85,051.01 is: 117,373.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,776.37 : 191,516.01 = 85,051.01 : x
  2. Step 2: Convert to fraction form
    138,776.37/191,516.01 = 85,051.01/x
  3. Step 3: Cross multiply
    138,776.37x = 191,516.01 × 85,051.01
  4. Step 4: Simplify right side
    138,776.37x = 16,288,629,124.09
  5. Step 5: Solve for x
    x = 16,288,629,124.09/138,776.37
  6. Step 6: Final answer
    x = 117,373.22

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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.