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Finding the Fourth Proportional to 100,634.50, 138,840.21 and 60,361.30

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Solution

The fourth proportional to 100,634.50, 138,840.21 and 60,361.30 is: 83,277.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,634.50 : 138,840.21 = 60,361.30 : x
  2. Step 2: Convert to fraction form
    100,634.50/138,840.21 = 60,361.30/x
  3. Step 3: Cross multiply
    100,634.50x = 138,840.21 × 60,361.30
  4. Step 4: Simplify right side
    100,634.50x = 8,380,575,567.87
  5. Step 5: Solve for x
    x = 8,380,575,567.87/100,634.50
  6. Step 6: Final answer
    x = 83,277.36

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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.