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Finding the Fourth Proportional to 273,117.90, 409,676.86 and 86,143.98

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Solution

The fourth proportional to 273,117.90, 409,676.86 and 86,143.98 is: 129,215.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    273,117.90 : 409,676.86 = 86,143.98 : x
  2. Step 2: Convert to fraction form
    273,117.90/409,676.86 = 86,143.98/x
  3. Step 3: Cross multiply
    273,117.90x = 409,676.86 × 86,143.98
  4. Step 4: Simplify right side
    273,117.90x = 35,291,195,234.30
  5. Step 5: Solve for x
    x = 35,291,195,234.30/273,117.90
  6. Step 6: Final answer
    x = 129,215.97

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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.