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Finding the Fourth Proportional to 85,819.60, 128,652.60 and 33,211.60

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Solution

The fourth proportional to 85,819.60, 128,652.60 and 33,211.60 is: 49,787.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,819.60 : 128,652.60 = 33,211.60 : x
  2. Step 2: Convert to fraction form
    85,819.60/128,652.60 = 33,211.60/x
  3. Step 3: Cross multiply
    85,819.60x = 128,652.60 × 33,211.60
  4. Step 4: Simplify right side
    85,819.60x = 4,272,758,690.16
  5. Step 5: Solve for x
    x = 4,272,758,690.16/85,819.60
  6. Step 6: Final answer
    x = 49,787.68

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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.