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Finding the Fourth Proportional to 170,140, 255,190.56 and 45,490.72

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Solution

The fourth proportional to 170,140, 255,190.56 and 45,490.72 is: 68,230.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,140 : 255,190.56 = 45,490.72 : x
  2. Step 2: Convert to fraction form
    170,140/255,190.56 = 45,490.72/x
  3. Step 3: Cross multiply
    170,140x = 255,190.56 × 45,490.72
  4. Step 4: Simplify right side
    170,140x = 11,608,802,311.60
  5. Step 5: Solve for x
    x = 11,608,802,311.60/170,140
  6. Step 6: Final answer
    x = 68,230.88

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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.