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Finding the Fourth Proportional to 134,612.30, 201,745.65 and 81,965.90

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Solution

The fourth proportional to 134,612.30, 201,745.65 and 81,965.90 is: 122,843.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,612.30 : 201,745.65 = 81,965.90 : x
  2. Step 2: Convert to fraction form
    134,612.30/201,745.65 = 81,965.90/x
  3. Step 3: Cross multiply
    134,612.30x = 201,745.65 × 81,965.90
  4. Step 4: Simplify right side
    134,612.30x = 16,536,263,773.34
  5. Step 5: Solve for x
    x = 16,536,263,773.34/134,612.30
  6. Step 6: Final answer
    x = 122,843.63

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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.