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Finding the Fourth Proportional to 139,480.62, 192,468.87 and 82,881.06

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Solution

The fourth proportional to 139,480.62, 192,468.87 and 82,881.06 is: 114,367.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,480.62 : 192,468.87 = 82,881.06 : x
  2. Step 2: Convert to fraction form
    139,480.62/192,468.87 = 82,881.06/x
  3. Step 3: Cross multiply
    139,480.62x = 192,468.87 × 82,881.06
  4. Step 4: Simplify right side
    139,480.62x = 15,952,023,962.60
  5. Step 5: Solve for x
    x = 15,952,023,962.60/139,480.62
  6. Step 6: Final answer
    x = 114,367.31

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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.