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Finding the Fourth Proportional to 126,893.16, 190,361.70 and 42,661.56

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Solution

The fourth proportional to 126,893.16, 190,361.70 and 42,661.56 is: 63,999.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,893.16 : 190,361.70 = 42,661.56 : x
  2. Step 2: Convert to fraction form
    126,893.16/190,361.70 = 42,661.56/x
  3. Step 3: Cross multiply
    126,893.16x = 190,361.70 × 42,661.56
  4. Step 4: Simplify right side
    126,893.16x = 8,121,127,086.25
  5. Step 5: Solve for x
    x = 8,121,127,086.25/126,893.16
  6. Step 6: Final answer
    x = 63,999.72

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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.