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Finding the Fourth Proportional to 76,133.78, 114,154.43 and 38,138.87

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Solution

The fourth proportional to 76,133.78, 114,154.43 and 38,138.87 is: 57,185.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,133.78 : 114,154.43 = 38,138.87 : x
  2. Step 2: Convert to fraction form
    76,133.78/114,154.43 = 38,138.87/x
  3. Step 3: Cross multiply
    76,133.78x = 114,154.43 × 38,138.87
  4. Step 4: Simplify right side
    76,133.78x = 4,353,720,394.92
  5. Step 5: Solve for x
    x = 4,353,720,394.92/76,133.78
  6. Step 6: Final answer
    x = 57,185.13

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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.