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Finding the Fourth Proportional to 100,623.36, 138,859.52 and 54,682.64

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Solution

The fourth proportional to 100,623.36, 138,859.52 and 54,682.64 is: 75,461.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,623.36 : 138,859.52 = 54,682.64 : x
  2. Step 2: Convert to fraction form
    100,623.36/138,859.52 = 54,682.64/x
  3. Step 3: Cross multiply
    100,623.36x = 138,859.52 × 54,682.64
  4. Step 4: Simplify right side
    100,623.36x = 7,593,205,142.73
  5. Step 5: Solve for x
    x = 7,593,205,142.73/100,623.36
  6. Step 6: Final answer
    x = 75,461.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.