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Finding the Fourth Proportional to 100,536.62, 138,741.98 and 55,218.68

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Solution

The fourth proportional to 100,536.62, 138,741.98 and 55,218.68 is: 76,202.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,536.62 : 138,741.98 = 55,218.68 : x
  2. Step 2: Convert to fraction form
    100,536.62/138,741.98 = 55,218.68/x
  3. Step 3: Cross multiply
    100,536.62x = 138,741.98 × 55,218.68
  4. Step 4: Simplify right side
    100,536.62x = 7,661,148,302.48
  5. Step 5: Solve for x
    x = 7,661,148,302.48/100,536.62
  6. Step 6: Final answer
    x = 76,202.56

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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.