Home / 139,242.94-192,164.74-78,813.36

Finding the Fourth Proportional to 139,242.94, 192,164.74 and 78,813.36

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Solution

The fourth proportional to 139,242.94, 192,164.74 and 78,813.36 is: 108,767.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,242.94 : 192,164.74 = 78,813.36 : x
  2. Step 2: Convert to fraction form
    139,242.94/192,164.74 = 78,813.36/x
  3. Step 3: Cross multiply
    139,242.94x = 192,164.74 × 78,813.36
  4. Step 4: Simplify right side
    139,242.94x = 15,145,148,635.89
  5. Step 5: Solve for x
    x = 15,145,148,635.89/139,242.94
  6. Step 6: Final answer
    x = 108,767.80

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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.