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Finding the Fourth Proportional to 159,604.92, 220,256.27 and 87,987.51

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Solution

The fourth proportional to 159,604.92, 220,256.27 and 87,987.51 is: 121,423.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,604.92 : 220,256.27 = 87,987.51 : x
  2. Step 2: Convert to fraction form
    159,604.92/220,256.27 = 87,987.51/x
  3. Step 3: Cross multiply
    159,604.92x = 220,256.27 × 87,987.51
  4. Step 4: Simplify right side
    159,604.92x = 19,379,800,834.60
  5. Step 5: Solve for x
    x = 19,379,800,834.60/159,604.92
  6. Step 6: Final answer
    x = 121,423.58

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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.