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Finding the Fourth Proportional to 136,910.40, 205,372.94 and 43,423.44

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Solution

The fourth proportional to 136,910.40, 205,372.94 and 43,423.44 is: 65,137.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,910.40 : 205,372.94 = 43,423.44 : x
  2. Step 2: Convert to fraction form
    136,910.40/205,372.94 = 43,423.44/x
  3. Step 3: Cross multiply
    136,910.40x = 205,372.94 × 43,423.44
  4. Step 4: Simplify right side
    136,910.40x = 8,917,999,537.71
  5. Step 5: Solve for x
    x = 8,917,999,537.71/136,910.40
  6. Step 6: Final answer
    x = 65,137.49

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.