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Finding the Fourth Proportional to 261,511.38, 360,765.72 and 154,029.96

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Solution

The fourth proportional to 261,511.38, 360,765.72 and 154,029.96 is: 212,490.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,511.38 : 360,765.72 = 154,029.96 : x
  2. Step 2: Convert to fraction form
    261,511.38/360,765.72 = 154,029.96/x
  3. Step 3: Cross multiply
    261,511.38x = 360,765.72 × 154,029.96
  4. Step 4: Simplify right side
    261,511.38x = 55,568,729,420.97
  5. Step 5: Solve for x
    x = 55,568,729,420.97/261,511.38
  6. Step 6: Final answer
    x = 212,490.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.