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Finding the Fourth Proportional to 98,195.71, 135,620.45 and 66,309.25

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Solution

The fourth proportional to 98,195.71, 135,620.45 and 66,309.25 is: 91,581.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,195.71 : 135,620.45 = 66,309.25 : x
  2. Step 2: Convert to fraction form
    98,195.71/135,620.45 = 66,309.25/x
  3. Step 3: Cross multiply
    98,195.71x = 135,620.45 × 66,309.25
  4. Step 4: Simplify right side
    98,195.71x = 8,992,890,324.16
  5. Step 5: Solve for x
    x = 8,992,890,324.16/98,195.71
  6. Step 6: Final answer
    x = 91,581.30

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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.