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Finding the Fourth Proportional to 144,835.20, 217,425.60 and 81,705.60

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Solution

The fourth proportional to 144,835.20, 217,425.60 and 81,705.60 is: 122,655.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,835.20 : 217,425.60 = 81,705.60 : x
  2. Step 2: Convert to fraction form
    144,835.20/217,425.60 = 81,705.60/x
  3. Step 3: Cross multiply
    144,835.20x = 217,425.60 × 81,705.60
  4. Step 4: Simplify right side
    144,835.20x = 17,764,889,103.36
  5. Step 5: Solve for x
    x = 17,764,889,103.36/144,835.20
  6. Step 6: Final answer
    x = 122,655.88

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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.