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Finding the Fourth Proportional to 139,796.55, 192,917.91 and 76,135.41

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Solution

The fourth proportional to 139,796.55, 192,917.91 and 76,135.41 is: 105,066.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,796.55 : 192,917.91 = 76,135.41 : x
  2. Step 2: Convert to fraction form
    139,796.55/192,917.91 = 76,135.41/x
  3. Step 3: Cross multiply
    139,796.55x = 192,917.91 × 76,135.41
  4. Step 4: Simplify right side
    139,796.55x = 14,687,884,174.19
  5. Step 5: Solve for x
    x = 14,687,884,174.19/139,796.55
  6. Step 6: Final answer
    x = 105,066.14

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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.