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Finding the Fourth Proportional to 84,243.01, 126,418.85 and 54,254.11

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Solution

The fourth proportional to 84,243.01, 126,418.85 and 54,254.11 is: 81,416.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,243.01 : 126,418.85 = 54,254.11 : x
  2. Step 2: Convert to fraction form
    84,243.01/126,418.85 = 54,254.11/x
  3. Step 3: Cross multiply
    84,243.01x = 126,418.85 × 54,254.11
  4. Step 4: Simplify right side
    84,243.01x = 6,858,742,193.97
  5. Step 5: Solve for x
    x = 6,858,742,193.97/84,243.01
  6. Step 6: Final answer
    x = 81,416.16

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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.