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Finding the Fourth Proportional to 139,642.22, 192,706.02 and 75,979.67

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Solution

The fourth proportional to 139,642.22, 192,706.02 and 75,979.67 is: 104,851.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,642.22 : 192,706.02 = 75,979.67 : x
  2. Step 2: Convert to fraction form
    139,642.22/192,706.02 = 75,979.67/x
  3. Step 3: Cross multiply
    139,642.22x = 192,706.02 × 75,979.67
  4. Step 4: Simplify right side
    139,642.22x = 14,641,738,843.08
  5. Step 5: Solve for x
    x = 14,641,738,843.08/139,642.22
  6. Step 6: Final answer
    x = 104,851.80

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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.