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Finding the Fourth Proportional to 159,101.76, 219,554.80 and 87,481.28

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Solution

The fourth proportional to 159,101.76, 219,554.80 and 87,481.28 is: 120,721.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,101.76 : 219,554.80 = 87,481.28 : x
  2. Step 2: Convert to fraction form
    159,101.76/219,554.80 = 87,481.28/x
  3. Step 3: Cross multiply
    159,101.76x = 219,554.80 × 87,481.28
  4. Step 4: Simplify right side
    159,101.76x = 19,206,934,934.14
  5. Step 5: Solve for x
    x = 19,206,934,934.14/159,101.76
  6. Step 6: Final answer
    x = 120,721.07

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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.