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Finding the Fourth Proportional to 91,260.48, 136,699.78 and 73,394.58

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Solution

The fourth proportional to 91,260.48, 136,699.78 and 73,394.58 is: 109,938.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,260.48 : 136,699.78 = 73,394.58 : x
  2. Step 2: Convert to fraction form
    91,260.48/136,699.78 = 73,394.58/x
  3. Step 3: Cross multiply
    91,260.48x = 136,699.78 × 73,394.58
  4. Step 4: Simplify right side
    91,260.48x = 10,033,022,939.19
  5. Step 5: Solve for x
    x = 10,033,022,939.19/91,260.48
  6. Step 6: Final answer
    x = 109,938.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.