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Finding the Fourth Proportional to 72,611.62, 100,199.10 and 40,783.48

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Solution

The fourth proportional to 72,611.62, 100,199.10 and 40,783.48 is: 56,278.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,611.62 : 100,199.10 = 40,783.48 : x
  2. Step 2: Convert to fraction form
    72,611.62/100,199.10 = 40,783.48/x
  3. Step 3: Cross multiply
    72,611.62x = 100,199.10 × 40,783.48
  4. Step 4: Simplify right side
    72,611.62x = 4,086,467,990.87
  5. Step 5: Solve for x
    x = 4,086,467,990.87/72,611.62
  6. Step 6: Final answer
    x = 56,278.43

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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.