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Finding the Fourth Proportional to 253,401.89, 349,694.55 and 138,680.60

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Solution

The fourth proportional to 253,401.89, 349,694.55 and 138,680.60 is: 191,379.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,401.89 : 349,694.55 = 138,680.60 : x
  2. Step 2: Convert to fraction form
    253,401.89/349,694.55 = 138,680.60/x
  3. Step 3: Cross multiply
    253,401.89x = 349,694.55 × 138,680.60
  4. Step 4: Simplify right side
    253,401.89x = 48,495,848,262.26
  5. Step 5: Solve for x
    x = 48,495,848,262.26/253,401.89
  6. Step 6: Final answer
    x = 191,379.19

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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.