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Finding the Fourth Proportional to 91,608.78, 126,418.95 and 51,321.81

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Solution

The fourth proportional to 91,608.78, 126,418.95 and 51,321.81 is: 70,823.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,608.78 : 126,418.95 = 51,321.81 : x
  2. Step 2: Convert to fraction form
    91,608.78/126,418.95 = 51,321.81/x
  3. Step 3: Cross multiply
    91,608.78x = 126,418.95 × 51,321.81
  4. Step 4: Simplify right side
    91,608.78x = 6,488,049,332.30
  5. Step 5: Solve for x
    x = 6,488,049,332.30/91,608.78
  6. Step 6: Final answer
    x = 70,823.44

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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.