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Finding the Fourth Proportional to 91,761.94, 126,497.43 and 64,856.98

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Solution

The fourth proportional to 91,761.94, 126,497.43 and 64,856.98 is: 89,407.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,761.94 : 126,497.43 = 64,856.98 : x
  2. Step 2: Convert to fraction form
    91,761.94/126,497.43 = 64,856.98/x
  3. Step 3: Cross multiply
    91,761.94x = 126,497.43 × 64,856.98
  4. Step 4: Simplify right side
    91,761.94x = 8,204,241,287.56
  5. Step 5: Solve for x
    x = 8,204,241,287.56/91,761.94
  6. Step 6: Final answer
    x = 89,407.89

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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.