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Finding the Fourth Proportional to 91,969.56, 126,918.84 and 55,671.84

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Solution

The fourth proportional to 91,969.56, 126,918.84 and 55,671.84 is: 76,827.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,969.56 : 126,918.84 = 55,671.84 : x
  2. Step 2: Convert to fraction form
    91,969.56/126,918.84 = 55,671.84/x
  3. Step 3: Cross multiply
    91,969.56x = 126,918.84 × 55,671.84
  4. Step 4: Simplify right side
    91,969.56x = 7,065,805,620.64
  5. Step 5: Solve for x
    x = 7,065,805,620.64/91,969.56
  6. Step 6: Final answer
    x = 76,827.65

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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.