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Finding the Fourth Proportional to 139,315.57, 192,253.80 and 75,653.82

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Solution

The fourth proportional to 139,315.57, 192,253.80 and 75,653.82 is: 104,401.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,315.57 : 192,253.80 = 75,653.82 : x
  2. Step 2: Convert to fraction form
    139,315.57/192,253.80 = 75,653.82/x
  3. Step 3: Cross multiply
    139,315.57x = 192,253.80 × 75,653.82
  4. Step 4: Simplify right side
    139,315.57x = 14,544,734,379.52
  5. Step 5: Solve for x
    x = 14,544,734,379.52/139,315.57
  6. Step 6: Final answer
    x = 104,401.36

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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.