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Finding the Fourth Proportional to 138,954.81, 191,823.76 and 93,093.42

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Solution

The fourth proportional to 138,954.81, 191,823.76 and 93,093.42 is: 128,513.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,954.81 : 191,823.76 = 93,093.42 : x
  2. Step 2: Convert to fraction form
    138,954.81/191,823.76 = 93,093.42/x
  3. Step 3: Cross multiply
    138,954.81x = 191,823.76 × 93,093.42
  4. Step 4: Simplify right side
    138,954.81x = 17,857,529,622.93
  5. Step 5: Solve for x
    x = 17,857,529,622.93/138,954.81
  6. Step 6: Final answer
    x = 128,513.22

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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.