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Finding the Fourth Proportional to 253,990.82, 350,511.37 and 139,279.91

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Solution

The fourth proportional to 253,990.82, 350,511.37 and 139,279.91 is: 192,208.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,990.82 : 350,511.37 = 139,279.91 : x
  2. Step 2: Convert to fraction form
    253,990.82/350,511.37 = 139,279.91/x
  3. Step 3: Cross multiply
    253,990.82x = 350,511.37 × 139,279.91
  4. Step 4: Simplify right side
    253,990.82x = 48,819,189,966.82
  5. Step 5: Solve for x
    x = 48,819,189,966.82/253,990.82
  6. Step 6: Final answer
    x = 192,208.48

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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.