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Finding the Fourth Proportional to 84,716.55, 126,929.03 and 55,119.15

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Solution

The fourth proportional to 84,716.55, 126,929.03 and 55,119.15 is: 82,583.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,716.55 : 126,929.03 = 55,119.15 : x
  2. Step 2: Convert to fraction form
    84,716.55/126,929.03 = 55,119.15/x
  3. Step 3: Cross multiply
    84,716.55x = 126,929.03 × 55,119.15
  4. Step 4: Simplify right side
    84,716.55x = 6,996,219,968.33
  5. Step 5: Solve for x
    x = 6,996,219,968.33/84,716.55
  6. Step 6: Final answer
    x = 82,583.86

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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.