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Finding the Fourth Proportional to 139,995.81, 193,193.24 and 76,336.29

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Solution

The fourth proportional to 139,995.81, 193,193.24 and 76,336.29 is: 105,343.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,995.81 : 193,193.24 = 76,336.29 : x
  2. Step 2: Convert to fraction form
    139,995.81/193,193.24 = 76,336.29/x
  3. Step 3: Cross multiply
    139,995.81x = 193,193.24 × 76,336.29
  4. Step 4: Simplify right side
    139,995.81x = 14,747,654,813.00
  5. Step 5: Solve for x
    x = 14,747,654,813.00/139,995.81
  6. Step 6: Final answer
    x = 105,343.54

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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.