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Finding the Fourth Proportional to 139,725.75, 192,821.54 and 76,059.75

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Solution

The fourth proportional to 139,725.75, 192,821.54 and 76,059.75 is: 104,962.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,725.75 : 192,821.54 = 76,059.75 : x
  2. Step 2: Convert to fraction form
    139,725.75/192,821.54 = 76,059.75/x
  3. Step 3: Cross multiply
    139,725.75x = 192,821.54 × 76,059.75
  4. Step 4: Simplify right side
    139,725.75x = 14,665,957,746.72
  5. Step 5: Solve for x
    x = 14,665,957,746.72/139,725.75
  6. Step 6: Final answer
    x = 104,962.46

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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.