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Finding the Fourth Proportional to 139,087.46, 191,940.54 and 75,424.94

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Solution

The fourth proportional to 139,087.46, 191,940.54 and 75,424.94 is: 104,086.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,087.46 : 191,940.54 = 75,424.94 : x
  2. Step 2: Convert to fraction form
    139,087.46/191,940.54 = 75,424.94/x
  3. Step 3: Cross multiply
    139,087.46x = 191,940.54 × 75,424.94
  4. Step 4: Simplify right side
    139,087.46x = 14,477,103,713.07
  5. Step 5: Solve for x
    x = 14,477,103,713.07/139,087.46
  6. Step 6: Final answer
    x = 104,086.33

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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.