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Finding the Fourth Proportional to 253,179.90, 349,381.35 and 139,998.78

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Solution

The fourth proportional to 253,179.90, 349,381.35 and 139,998.78 is: 193,194.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,179.90 : 349,381.35 = 139,998.78 : x
  2. Step 2: Convert to fraction form
    253,179.90/349,381.35 = 139,998.78/x
  3. Step 3: Cross multiply
    253,179.90x = 349,381.35 × 139,998.78
  4. Step 4: Simplify right side
    253,179.90x = 48,912,962,754.75
  5. Step 5: Solve for x
    x = 48,912,962,754.75/253,179.90
  6. Step 6: Final answer
    x = 193,194.49

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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.