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Finding the Fourth Proportional to 210,181.20, 315,271.80 and 206,725.20

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Solution

The fourth proportional to 210,181.20, 315,271.80 and 206,725.20 is: 310,087.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,181.20 : 315,271.80 = 206,725.20 : x
  2. Step 2: Convert to fraction form
    210,181.20/315,271.80 = 206,725.20/x
  3. Step 3: Cross multiply
    210,181.20x = 315,271.80 × 206,725.20
  4. Step 4: Simplify right side
    210,181.20x = 65,174,625,909.36
  5. Step 5: Solve for x
    x = 65,174,625,909.36/210,181.20
  6. Step 6: Final answer
    x = 310,087.80

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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.