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Finding the Fourth Proportional to 91,750, 126,615.21 and 53,535.82

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Solution

The fourth proportional to 91,750, 126,615.21 and 53,535.82 is: 73,879.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,750 : 126,615.21 = 53,535.82 : x
  2. Step 2: Convert to fraction form
    91,750/126,615.21 = 53,535.82/x
  3. Step 3: Cross multiply
    91,750x = 126,615.21 × 53,535.82
  4. Step 4: Simplify right side
    91,750x = 6,778,449,091.82
  5. Step 5: Solve for x
    x = 6,778,449,091.82/91,750
  6. Step 6: Final answer
    x = 73,879.55

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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.