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Finding the Fourth Proportional to 164,731.60, 247,039.80 and 85,819.60

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Solution

The fourth proportional to 164,731.60, 247,039.80 and 85,819.60 is: 128,699.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    164,731.60 : 247,039.80 = 85,819.60 : x
  2. Step 2: Convert to fraction form
    164,731.60/247,039.80 = 85,819.60/x
  3. Step 3: Cross multiply
    164,731.60x = 247,039.80 × 85,819.60
  4. Step 4: Simplify right side
    164,731.60x = 21,200,856,820.08
  5. Step 5: Solve for x
    x = 21,200,856,820.08/164,731.60
  6. Step 6: Final answer
    x = 128,699.39

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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.