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Finding the Fourth Proportional to 153,902.88, 211,912.24 and 131,190.96

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Solution

The fourth proportional to 153,902.88, 211,912.24 and 131,190.96 is: 180,639.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,902.88 : 211,912.24 = 131,190.96 : x
  2. Step 2: Convert to fraction form
    153,902.88/211,912.24 = 131,190.96/x
  3. Step 3: Cross multiply
    153,902.88x = 211,912.24 × 131,190.96
  4. Step 4: Simplify right side
    153,902.88x = 27,800,970,201.35
  5. Step 5: Solve for x
    x = 27,800,970,201.35/153,902.88
  6. Step 6: Final answer
    x = 180,639.70

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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.