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Finding the Fourth Proportional to 159,318.34, 219,859.26 and 87,698

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Solution

The fourth proportional to 159,318.34, 219,859.26 and 87,698 is: 121,023.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,318.34 : 219,859.26 = 87,698 : x
  2. Step 2: Convert to fraction form
    159,318.34/219,859.26 = 87,698/x
  3. Step 3: Cross multiply
    159,318.34x = 219,859.26 × 87,698
  4. Step 4: Simplify right side
    159,318.34x = 19,281,217,383.48
  5. Step 5: Solve for x
    x = 19,281,217,383.48/159,318.34
  6. Step 6: Final answer
    x = 121,023.21

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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.