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Finding the Fourth Proportional to 269,271.20, 403,906.80 and 91,978.40

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Solution

The fourth proportional to 269,271.20, 403,906.80 and 91,978.40 is: 137,967.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    269,271.20 : 403,906.80 = 91,978.40 : x
  2. Step 2: Convert to fraction form
    269,271.20/403,906.80 = 91,978.40/x
  3. Step 3: Cross multiply
    269,271.20x = 403,906.80 × 91,978.40
  4. Step 4: Simplify right side
    269,271.20x = 37,150,701,213.12
  5. Step 5: Solve for x
    x = 37,150,701,213.12/269,271.20
  6. Step 6: Final answer
    x = 137,967.60

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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.