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Finding the Fourth Proportional to 275,159.70, 412,803.90 and 85,610.70

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Solution

The fourth proportional to 275,159.70, 412,803.90 and 85,610.70 is: 128,436.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,159.70 : 412,803.90 = 85,610.70 : x
  2. Step 2: Convert to fraction form
    275,159.70/412,803.90 = 85,610.70/x
  3. Step 3: Cross multiply
    275,159.70x = 412,803.90 × 85,610.70
  4. Step 4: Simplify right side
    275,159.70x = 35,340,430,841.73
  5. Step 5: Solve for x
    x = 35,340,430,841.73/275,159.70
  6. Step 6: Final answer
    x = 128,436.07

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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.