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Finding the Fourth Proportional to 139,622.94, 192,678.78 and 75,961.02

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Solution

The fourth proportional to 139,622.94, 192,678.78 and 75,961.02 is: 104,825.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,622.94 : 192,678.78 = 75,961.02 : x
  2. Step 2: Convert to fraction form
    139,622.94/192,678.78 = 75,961.02/x
  3. Step 3: Cross multiply
    139,622.94x = 192,678.78 × 75,961.02
  4. Step 4: Simplify right side
    139,622.94x = 14,636,076,661.16
  5. Step 5: Solve for x
    x = 14,636,076,661.16/139,622.94
  6. Step 6: Final answer
    x = 104,825.73

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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.