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Finding the Fourth Proportional to 139,663.13, 192,739.14 and 76,004.96

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Solution

The fourth proportional to 139,663.13, 192,739.14 and 76,004.96 is: 104,889.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,663.13 : 192,739.14 = 76,004.96 : x
  2. Step 2: Convert to fraction form
    139,663.13/192,739.14 = 76,004.96/x
  3. Step 3: Cross multiply
    139,663.13x = 192,739.14 × 76,004.96
  4. Step 4: Simplify right side
    139,663.13x = 14,649,129,954.27
  5. Step 5: Solve for x
    x = 14,649,129,954.27/139,663.13
  6. Step 6: Final answer
    x = 104,889.03

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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.