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Finding the Fourth Proportional to 159,265.43, 219,780.70 and 87,643.61

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Solution

The fourth proportional to 159,265.43, 219,780.70 and 87,643.61 is: 120,945.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,265.43 : 219,780.70 = 87,643.61 : x
  2. Step 2: Convert to fraction form
    159,265.43/219,780.70 = 87,643.61/x
  3. Step 3: Cross multiply
    159,265.43x = 219,780.70 × 87,643.61
  4. Step 4: Simplify right side
    159,265.43x = 19,262,372,638.31
  5. Step 5: Solve for x
    x = 19,262,372,638.31/159,265.43
  6. Step 6: Final answer
    x = 120,945.10

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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.