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Finding the Fourth Proportional to 386,091.36, 579,137.04 and 105,611.04

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Solution

The fourth proportional to 386,091.36, 579,137.04 and 105,611.04 is: 158,416.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,091.36 : 579,137.04 = 105,611.04 : x
  2. Step 2: Convert to fraction form
    386,091.36/579,137.04 = 105,611.04/x
  3. Step 3: Cross multiply
    386,091.36x = 579,137.04 × 105,611.04
  4. Step 4: Simplify right side
    386,091.36x = 61,163,265,096.92
  5. Step 5: Solve for x
    x = 61,163,265,096.92/386,091.36
  6. Step 6: Final answer
    x = 158,416.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.