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Finding the Fourth Proportional to 139,415.99, 192,395.25 and 75,753.79

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Solution

The fourth proportional to 139,415.99, 192,395.25 and 75,753.79 is: 104,540.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,415.99 : 192,395.25 = 75,753.79 : x
  2. Step 2: Convert to fraction form
    139,415.99/192,395.25 = 75,753.79/x
  3. Step 3: Cross multiply
    139,415.99x = 192,395.25 × 75,753.79
  4. Step 4: Simplify right side
    139,415.99x = 14,574,669,365.50
  5. Step 5: Solve for x
    x = 14,574,669,365.50/139,415.99
  6. Step 6: Final answer
    x = 104,540.87

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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.