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Finding the Fourth Proportional to 159,243.92, 219,731.52 and 91,247.80

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Solution

The fourth proportional to 159,243.92, 219,731.52 and 91,247.80 is: 125,907.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,243.92 : 219,731.52 = 91,247.80 : x
  2. Step 2: Convert to fraction form
    159,243.92/219,731.52 = 91,247.80/x
  3. Step 3: Cross multiply
    159,243.92x = 219,731.52 × 91,247.80
  4. Step 4: Simplify right side
    159,243.92x = 20,050,017,790.66
  5. Step 5: Solve for x
    x = 20,050,017,790.66/159,243.92
  6. Step 6: Final answer
    x = 125,907.59

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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.