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Finding the Fourth Proportional to 159,249.28, 219,765 and 87,627.28

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Solution

The fourth proportional to 159,249.28, 219,765 and 87,627.28 is: 120,926.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,249.28 : 219,765 = 87,627.28 : x
  2. Step 2: Convert to fraction form
    159,249.28/219,765 = 87,627.28/x
  3. Step 3: Cross multiply
    159,249.28x = 219,765 × 87,627.28
  4. Step 4: Simplify right side
    159,249.28x = 19,257,409,189.20
  5. Step 5: Solve for x
    x = 19,257,409,189.20/159,249.28
  6. Step 6: Final answer
    x = 120,926.19

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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.