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Finding the Fourth Proportional to 84,892.66, 127,249.68 and 28,679.47

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Solution

The fourth proportional to 84,892.66, 127,249.68 and 28,679.47 is: 42,989.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,892.66 : 127,249.68 = 28,679.47 : x
  2. Step 2: Convert to fraction form
    84,892.66/127,249.68 = 28,679.47/x
  3. Step 3: Cross multiply
    84,892.66x = 127,249.68 × 28,679.47
  4. Step 4: Simplify right side
    84,892.66x = 3,649,453,169.49
  5. Step 5: Solve for x
    x = 3,649,453,169.49/84,892.66
  6. Step 6: Final answer
    x = 42,989.03

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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.