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Finding the Fourth Proportional to 121,076.84, 167,085.24 and 66,628.64

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Solution

The fourth proportional to 121,076.84, 167,085.24 and 66,628.64 is: 91,947.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,076.84 : 167,085.24 = 66,628.64 : x
  2. Step 2: Convert to fraction form
    121,076.84/167,085.24 = 66,628.64/x
  3. Step 3: Cross multiply
    121,076.84x = 167,085.24 × 66,628.64
  4. Step 4: Simplify right side
    121,076.84x = 11,132,662,305.27
  5. Step 5: Solve for x
    x = 11,132,662,305.27/121,076.84
  6. Step 6: Final answer
    x = 91,947.08

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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.