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Finding the Fourth Proportional to 139,761.64, 192,990.96 and 135,242.56

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Solution

The fourth proportional to 139,761.64, 192,990.96 and 135,242.56 is: 186,750.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,761.64 : 192,990.96 = 135,242.56 : x
  2. Step 2: Convert to fraction form
    139,761.64/192,990.96 = 135,242.56/x
  3. Step 3: Cross multiply
    139,761.64x = 192,990.96 × 135,242.56
  4. Step 4: Simplify right side
    139,761.64x = 26,100,591,487.26
  5. Step 5: Solve for x
    x = 26,100,591,487.26/139,761.64
  6. Step 6: Final answer
    x = 186,750.75

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1.5x scale

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.