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Finding the Fourth Proportional to 159,181.50, 219,668.12 and 87,557.25

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Solution

The fourth proportional to 159,181.50, 219,668.12 and 87,557.25 is: 120,827.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,181.50 : 219,668.12 = 87,557.25 : x
  2. Step 2: Convert to fraction form
    159,181.50/219,668.12 = 87,557.25/x
  3. Step 3: Cross multiply
    159,181.50x = 219,668.12 × 87,557.25
  4. Step 4: Simplify right side
    159,181.50x = 19,233,536,062.08
  5. Step 5: Solve for x
    x = 19,233,536,062.08/159,181.50
  6. Step 6: Final answer
    x = 120,827.71

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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.