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Finding the Fourth Proportional to 215,695.40, 323,735.10 and 126,837.80

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Solution

The fourth proportional to 215,695.40, 323,735.10 and 126,837.80 is: 190,369.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,695.40 : 323,735.10 = 126,837.80 : x
  2. Step 2: Convert to fraction form
    215,695.40/323,735.10 = 126,837.80/x
  3. Step 3: Cross multiply
    215,695.40x = 323,735.10 × 126,837.80
  4. Step 4: Simplify right side
    215,695.40x = 41,061,847,866.78
  5. Step 5: Solve for x
    x = 41,061,847,866.78/215,695.40
  6. Step 6: Final answer
    x = 190,369.60

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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.