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Finding the Fourth Proportional to 139,747.49, 192,855.02 and 76,088.78

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Solution

The fourth proportional to 139,747.49, 192,855.02 and 76,088.78 is: 105,004.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,747.49 : 192,855.02 = 76,088.78 : x
  2. Step 2: Convert to fraction form
    139,747.49/192,855.02 = 76,088.78/x
  3. Step 3: Cross multiply
    139,747.49x = 192,855.02 × 76,088.78
  4. Step 4: Simplify right side
    139,747.49x = 14,674,103,188.68
  5. Step 5: Solve for x
    x = 14,674,103,188.68/139,747.49
  6. Step 6: Final answer
    x = 105,004.41

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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.