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Finding the Fourth Proportional to 91,657.96, 126,489.48 and 51,380.68

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Solution

The fourth proportional to 91,657.96, 126,489.48 and 51,380.68 is: 70,906.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,657.96 : 126,489.48 = 51,380.68 : x
  2. Step 2: Convert to fraction form
    91,657.96/126,489.48 = 51,380.68/x
  3. Step 3: Cross multiply
    91,657.96x = 126,489.48 × 51,380.68
  4. Step 4: Simplify right side
    91,657.96x = 6,499,115,495.25
  5. Step 5: Solve for x
    x = 6,499,115,495.25/91,657.96
  6. Step 6: Final answer
    x = 70,906.18

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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.