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Finding the Fourth Proportional to 85,847.71, 128,769.60 and 22,672.29

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Solution

The fourth proportional to 85,847.71, 128,769.60 and 22,672.29 is: 34,007.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,847.71 : 128,769.60 = 22,672.29 : x
  2. Step 2: Convert to fraction form
    85,847.71/128,769.60 = 22,672.29/x
  3. Step 3: Cross multiply
    85,847.71x = 128,769.60 × 22,672.29
  4. Step 4: Simplify right side
    85,847.71x = 2,919,501,070.54
  5. Step 5: Solve for x
    x = 2,919,501,070.54/85,847.71
  6. Step 6: Final answer
    x = 34,007.91

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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.