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Finding the Fourth Proportional to 139,665.66, 192,739.26 and 76,004.11

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Solution

The fourth proportional to 139,665.66, 192,739.26 and 76,004.11 is: 104,886.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,665.66 : 192,739.26 = 76,004.11 : x
  2. Step 2: Convert to fraction form
    139,665.66/192,739.26 = 76,004.11/x
  3. Step 3: Cross multiply
    139,665.66x = 192,739.26 × 76,004.11
  4. Step 4: Simplify right side
    139,665.66x = 14,648,975,918.36
  5. Step 5: Solve for x
    x = 14,648,975,918.36/139,665.66
  6. Step 6: Final answer
    x = 104,886.03

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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.