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Finding the Fourth Proportional to 253,074.54, 349,229.16 and 139,890

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Solution

The fourth proportional to 253,074.54, 349,229.16 and 139,890 is: 193,040.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,074.54 : 349,229.16 = 139,890 : x
  2. Step 2: Convert to fraction form
    253,074.54/349,229.16 = 139,890/x
  3. Step 3: Cross multiply
    253,074.54x = 349,229.16 × 139,890
  4. Step 4: Simplify right side
    253,074.54x = 48,853,667,192.40
  5. Step 5: Solve for x
    x = 48,853,667,192.40/253,074.54
  6. Step 6: Final answer
    x = 193,040.62

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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.