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Finding the Fourth Proportional to 85,916.20, 128,876.46 and 33,337.48

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Solution

The fourth proportional to 85,916.20, 128,876.46 and 33,337.48 is: 50,007.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,916.20 : 128,876.46 = 33,337.48 : x
  2. Step 2: Convert to fraction form
    85,916.20/128,876.46 = 33,337.48/x
  3. Step 3: Cross multiply
    85,916.20x = 128,876.46 × 33,337.48
  4. Step 4: Simplify right side
    85,916.20x = 4,296,416,407.72
  5. Step 5: Solve for x
    x = 4,296,416,407.72/85,916.20
  6. Step 6: Final answer
    x = 50,007.06

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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.