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Finding the Fourth Proportional to 136,046.76, 203,730.75 and 85,975.80

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Solution

The fourth proportional to 136,046.76, 203,730.75 and 85,975.80 is: 128,749.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,046.76 : 203,730.75 = 85,975.80 : x
  2. Step 2: Convert to fraction form
    136,046.76/203,730.75 = 85,975.80/x
  3. Step 3: Cross multiply
    136,046.76x = 203,730.75 × 85,975.80
  4. Step 4: Simplify right side
    136,046.76x = 17,515,914,215.85
  5. Step 5: Solve for x
    x = 17,515,914,215.85/136,046.76
  6. Step 6: Final answer
    x = 128,749.22

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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.