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Finding the Fourth Proportional to 91,398.87, 126,133.88 and 51,112.53

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Solution

The fourth proportional to 91,398.87, 126,133.88 and 51,112.53 is: 70,537.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,398.87 : 126,133.88 = 51,112.53 : x
  2. Step 2: Convert to fraction form
    91,398.87/126,133.88 = 51,112.53/x
  3. Step 3: Cross multiply
    91,398.87x = 126,133.88 × 51,112.53
  4. Step 4: Simplify right side
    91,398.87x = 6,447,021,469.95
  5. Step 5: Solve for x
    x = 6,447,021,469.95/91,398.87
  6. Step 6: Final answer
    x = 70,537.21

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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.