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Finding the Fourth Proportional to 121,701.57, 167,944.89 and 66,508.73

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Solution

The fourth proportional to 121,701.57, 167,944.89 and 66,508.73 is: 91,780.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,701.57 : 167,944.89 = 66,508.73 : x
  2. Step 2: Convert to fraction form
    121,701.57/167,944.89 = 66,508.73/x
  3. Step 3: Cross multiply
    121,701.57x = 167,944.89 × 66,508.73
  4. Step 4: Simplify right side
    121,701.57x = 11,169,800,504.17
  5. Step 5: Solve for x
    x = 11,169,800,504.17/121,701.57
  6. Step 6: Final answer
    x = 91,780.25

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1.5x scale

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.