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Finding the Fourth Proportional to 139,969.44, 193,160.34 and 76,309.92

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Solution

The fourth proportional to 139,969.44, 193,160.34 and 76,309.92 is: 105,309.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,969.44 : 193,160.34 = 76,309.92 : x
  2. Step 2: Convert to fraction form
    139,969.44/193,160.34 = 76,309.92/x
  3. Step 3: Cross multiply
    139,969.44x = 193,160.34 × 76,309.92
  4. Step 4: Simplify right side
    139,969.44x = 14,740,050,092.57
  5. Step 5: Solve for x
    x = 14,740,050,092.57/139,969.44
  6. Step 6: Final answer
    x = 105,309.06

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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.