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Finding the Fourth Proportional to 91,608.63, 138,036.94 and 75,333.21

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Solution

The fourth proportional to 91,608.63, 138,036.94 and 75,333.21 is: 113,512.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,608.63 : 138,036.94 = 75,333.21 : x
  2. Step 2: Convert to fraction form
    91,608.63/138,036.94 = 75,333.21/x
  3. Step 3: Cross multiply
    91,608.63x = 138,036.94 × 75,333.21
  4. Step 4: Simplify right side
    91,608.63x = 10,398,765,788.78
  5. Step 5: Solve for x
    x = 10,398,765,788.78/91,608.63
  6. Step 6: Final answer
    x = 113,512.95

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.