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Finding the Fourth Proportional to 159,209.88, 219,709.64 and 87,588.37

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Solution

The fourth proportional to 159,209.88, 219,709.64 and 87,588.37 is: 120,871.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,209.88 : 219,709.64 = 87,588.37 : x
  2. Step 2: Convert to fraction form
    159,209.88/219,709.64 = 87,588.37/x
  3. Step 3: Cross multiply
    159,209.88x = 219,709.64 × 87,588.37
  4. Step 4: Simplify right side
    159,209.88x = 19,244,008,417.90
  5. Step 5: Solve for x
    x = 19,244,008,417.90/159,209.88
  6. Step 6: Final answer
    x = 120,871.95

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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.