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Finding the Fourth Proportional to 72,611.68, 100,203.80 and 40,351.56

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Solution

The fourth proportional to 72,611.68, 100,203.80 and 40,351.56 is: 55,684.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,611.68 : 100,203.80 = 40,351.56 : x
  2. Step 2: Convert to fraction form
    72,611.68/100,203.80 = 40,351.56/x
  3. Step 3: Cross multiply
    72,611.68x = 100,203.80 × 40,351.56
  4. Step 4: Simplify right side
    72,611.68x = 4,043,378,945.15
  5. Step 5: Solve for x
    x = 4,043,378,945.15/72,611.68
  6. Step 6: Final answer
    x = 55,684.97

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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.