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Finding the Fourth Proportional to 159,599.80, 220,249.26 and 87,982.40

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Solution

The fourth proportional to 159,599.80, 220,249.26 and 87,982.40 is: 121,416.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,599.80 : 220,249.26 = 87,982.40 : x
  2. Step 2: Convert to fraction form
    159,599.80/220,249.26 = 87,982.40/x
  3. Step 3: Cross multiply
    159,599.80x = 220,249.26 × 87,982.40
  4. Step 4: Simplify right side
    159,599.80x = 19,378,058,493.02
  5. Step 5: Solve for x
    x = 19,378,058,493.02/159,599.80
  6. Step 6: Final answer
    x = 121,416.56

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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.