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Finding the Fourth Proportional to 144,887.60, 217,039.80 and 82,485.20

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Solution

The fourth proportional to 144,887.60, 217,039.80 and 82,485.20 is: 123,561.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,887.60 : 217,039.80 = 82,485.20 : x
  2. Step 2: Convert to fraction form
    144,887.60/217,039.80 = 82,485.20/x
  3. Step 3: Cross multiply
    144,887.60x = 217,039.80 × 82,485.20
  4. Step 4: Simplify right side
    144,887.60x = 17,902,571,310.96
  5. Step 5: Solve for x
    x = 17,902,571,310.96/144,887.60
  6. Step 6: Final answer
    x = 123,561.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.