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Finding the Fourth Proportional to 159,640.30, 220,302.79 and 87,047.09

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Solution

The fourth proportional to 159,640.30, 220,302.79 and 87,047.09 is: 120,124.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,640.30 : 220,302.79 = 87,047.09 : x
  2. Step 2: Convert to fraction form
    159,640.30/220,302.79 = 87,047.09/x
  3. Step 3: Cross multiply
    159,640.30x = 220,302.79 × 87,047.09
  4. Step 4: Simplify right side
    159,640.30x = 19,176,716,788.38
  5. Step 5: Solve for x
    x = 19,176,716,788.38/159,640.30
  6. Step 6: Final answer
    x = 120,124.53

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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.