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Finding the Fourth Proportional to 109,991.49, 151,788.25 and 59,690.49

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Solution

The fourth proportional to 109,991.49, 151,788.25 and 59,690.49 is: 82,372.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,991.49 : 151,788.25 = 59,690.49 : x
  2. Step 2: Convert to fraction form
    109,991.49/151,788.25 = 59,690.49/x
  3. Step 3: Cross multiply
    109,991.49x = 151,788.25 × 59,690.49
  4. Step 4: Simplify right side
    109,991.49x = 9,060,314,869.52
  5. Step 5: Solve for x
    x = 9,060,314,869.52/109,991.49
  6. Step 6: Final answer
    x = 82,372.87

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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.