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Finding the Fourth Proportional to 65,920.44, 90,971.46 and 36,112.44

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Solution

The fourth proportional to 65,920.44, 90,971.46 and 36,112.44 is: 49,835.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,920.44 : 90,971.46 = 36,112.44 : x
  2. Step 2: Convert to fraction form
    65,920.44/90,971.46 = 36,112.44/x
  3. Step 3: Cross multiply
    65,920.44x = 90,971.46 × 36,112.44
  4. Step 4: Simplify right side
    65,920.44x = 3,285,201,390.96
  5. Step 5: Solve for x
    x = 3,285,201,390.96/65,920.44
  6. Step 6: Final answer
    x = 49,835.85

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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.