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Finding the Fourth Proportional to 81,606.76, 122,295.26 and 64,892.60

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Solution

The fourth proportional to 81,606.76, 122,295.26 and 64,892.60 is: 97,247.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,606.76 : 122,295.26 = 64,892.60 : x
  2. Step 2: Convert to fraction form
    81,606.76/122,295.26 = 64,892.60/x
  3. Step 3: Cross multiply
    81,606.76x = 122,295.26 × 64,892.60
  4. Step 4: Simplify right side
    81,606.76x = 7,936,057,389.08
  5. Step 5: Solve for x
    x = 7,936,057,389.08/81,606.76
  6. Step 6: Final answer
    x = 97,247.55

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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.