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Finding the Fourth Proportional to 139,618.84, 192,676.30 and 75,956.68

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Solution

The fourth proportional to 139,618.84, 192,676.30 and 75,956.68 is: 104,821.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,618.84 : 192,676.30 = 75,956.68 : x
  2. Step 2: Convert to fraction form
    139,618.84/192,676.30 = 75,956.68/x
  3. Step 3: Cross multiply
    139,618.84x = 192,676.30 × 75,956.68
  4. Step 4: Simplify right side
    139,618.84x = 14,635,052,062.68
  5. Step 5: Solve for x
    x = 14,635,052,062.68/139,618.84
  6. Step 6: Final answer
    x = 104,821.47

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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.