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Finding the Fourth Proportional to 272,861.70, 409,337.35 and 85,828.10

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Solution

The fourth proportional to 272,861.70, 409,337.35 and 85,828.10 is: 128,756.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,861.70 : 409,337.35 = 85,828.10 : x
  2. Step 2: Convert to fraction form
    272,861.70/409,337.35 = 85,828.10/x
  3. Step 3: Cross multiply
    272,861.70x = 409,337.35 × 85,828.10
  4. Step 4: Simplify right side
    272,861.70x = 35,132,647,009.54
  5. Step 5: Solve for x
    x = 35,132,647,009.54/272,861.70
  6. Step 6: Final answer
    x = 128,756.24

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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.