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Finding the Fourth Proportional to 91,956, 126,899.40 and 52,212

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Solution

The fourth proportional to 91,956, 126,899.40 and 52,212 is: 72,052.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,956 : 126,899.40 = 52,212 : x
  2. Step 2: Convert to fraction form
    91,956/126,899.40 = 52,212/x
  3. Step 3: Cross multiply
    91,956x = 126,899.40 × 52,212
  4. Step 4: Simplify right side
    91,956x = 6,625,671,472.80
  5. Step 5: Solve for x
    x = 6,625,671,472.80/91,956
  6. Step 6: Final answer
    x = 72,052.63

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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.