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Finding the Fourth Proportional to 159,060.90, 219,506.31 and 87,447.54

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Solution

The fourth proportional to 159,060.90, 219,506.31 and 87,447.54 is: 120,678.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,060.90 : 219,506.31 = 87,447.54 : x
  2. Step 2: Convert to fraction form
    159,060.90/219,506.31 = 87,447.54/x
  3. Step 3: Cross multiply
    159,060.90x = 219,506.31 × 87,447.54
  4. Step 4: Simplify right side
    159,060.90x = 19,195,286,823.98
  5. Step 5: Solve for x
    x = 19,195,286,823.98/159,060.90
  6. Step 6: Final answer
    x = 120,678.85

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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.