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Finding the Fourth Proportional to 270,605.02, 405,899.16 and 128,552.56

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Solution

The fourth proportional to 270,605.02, 405,899.16 and 128,552.56 is: 192,824.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,605.02 : 405,899.16 = 128,552.56 : x
  2. Step 2: Convert to fraction form
    270,605.02/405,899.16 = 128,552.56/x
  3. Step 3: Cross multiply
    270,605.02x = 405,899.16 × 128,552.56
  4. Step 4: Simplify right side
    270,605.02x = 52,179,376,119.85
  5. Step 5: Solve for x
    x = 52,179,376,119.85/270,605.02
  6. Step 6: Final answer
    x = 192,824.86

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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.