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Finding the Fourth Proportional to 51,660, 71,279.82 and 30,431.52

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Solution

The fourth proportional to 51,660, 71,279.82 and 30,431.52 is: 41,989.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,660 : 71,279.82 = 30,431.52 : x
  2. Step 2: Convert to fraction form
    51,660/71,279.82 = 30,431.52/x
  3. Step 3: Cross multiply
    51,660x = 71,279.82 × 30,431.52
  4. Step 4: Simplify right side
    51,660x = 2,169,153,267.93
  5. Step 5: Solve for x
    x = 2,169,153,267.93/51,660
  6. Step 6: Final answer
    x = 41,989.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.