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Finding the Fourth Proportional to 159,606.54, 220,256.97 and 87,987.78

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Solution

The fourth proportional to 159,606.54, 220,256.97 and 87,987.78 is: 121,423.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,606.54 : 220,256.97 = 87,987.78 : x
  2. Step 2: Convert to fraction form
    159,606.54/220,256.97 = 87,987.78/x
  3. Step 3: Cross multiply
    159,606.54x = 220,256.97 × 87,987.78
  4. Step 4: Simplify right side
    159,606.54x = 19,379,921,819.83
  5. Step 5: Solve for x
    x = 19,379,921,819.83/159,606.54
  6. Step 6: Final answer
    x = 121,423.11

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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.