Home / 139,839.12-192,982.44-76,178.96

Finding the Fourth Proportional to 139,839.12, 192,982.44 and 76,178.96

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Solution

The fourth proportional to 139,839.12, 192,982.44 and 76,178.96 is: 105,129.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,839.12 : 192,982.44 = 76,178.96 : x
  2. Step 2: Convert to fraction form
    139,839.12/192,982.44 = 76,178.96/x
  3. Step 3: Cross multiply
    139,839.12x = 192,982.44 × 76,178.96
  4. Step 4: Simplify right side
    139,839.12x = 14,701,201,577.46
  5. Step 5: Solve for x
    x = 14,701,201,577.46/139,839.12
  6. Step 6: Final answer
    x = 105,129.39

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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.