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Finding the Fourth Proportional to 157,940.76, 217,817.16 and 131,040.66

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Solution

The fourth proportional to 157,940.76, 217,817.16 and 131,040.66 is: 180,719.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,940.76 : 217,817.16 = 131,040.66 : x
  2. Step 2: Convert to fraction form
    157,940.76/217,817.16 = 131,040.66/x
  3. Step 3: Cross multiply
    157,940.76x = 217,817.16 × 131,040.66
  4. Step 4: Simplify right side
    157,940.76x = 28,542,904,405.73
  5. Step 5: Solve for x
    x = 28,542,904,405.73/157,940.76
  6. Step 6: Final answer
    x = 180,719.05

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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.