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Finding the Fourth Proportional to 381,995.37, 572,636.93 and 129,099.03

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Solution

The fourth proportional to 381,995.37, 572,636.93 and 129,099.03 is: 193,528.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,995.37 : 572,636.93 = 129,099.03 : x
  2. Step 2: Convert to fraction form
    381,995.37/572,636.93 = 129,099.03/x
  3. Step 3: Cross multiply
    381,995.37x = 572,636.93 × 129,099.03
  4. Step 4: Simplify right side
    381,995.37x = 73,926,872,205.18
  5. Step 5: Solve for x
    x = 73,926,872,205.18/381,995.37
  6. Step 6: Final answer
    x = 193,528.19

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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.