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Finding the Fourth Proportional to 79,611.46, 109,864 and 43,803.78

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Solution

The fourth proportional to 79,611.46, 109,864 and 43,803.78 is: 60,449.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,611.46 : 109,864 = 43,803.78 : x
  2. Step 2: Convert to fraction form
    79,611.46/109,864 = 43,803.78/x
  3. Step 3: Cross multiply
    79,611.46x = 109,864 × 43,803.78
  4. Step 4: Simplify right side
    79,611.46x = 4,812,458,485.92
  5. Step 5: Solve for x
    x = 4,812,458,485.92/79,611.46
  6. Step 6: Final answer
    x = 60,449.32

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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.