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Finding the Fourth Proportional to 159,391.08, 219,961.12 and 87,771.38

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Solution

The fourth proportional to 159,391.08, 219,961.12 and 87,771.38 is: 121,125.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,391.08 : 219,961.12 = 87,771.38 : x
  2. Step 2: Convert to fraction form
    159,391.08/219,961.12 = 87,771.38/x
  3. Step 3: Cross multiply
    159,391.08x = 219,961.12 × 87,771.38
  4. Step 4: Simplify right side
    159,391.08x = 19,306,291,048.75
  5. Step 5: Solve for x
    x = 19,306,291,048.75/159,391.08
  6. Step 6: Final answer
    x = 121,125.29

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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.