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Finding the Fourth Proportional to 100,372.76, 138,516.24 and 55,047.99

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Solution

The fourth proportional to 100,372.76, 138,516.24 and 55,047.99 is: 75,967.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,372.76 : 138,516.24 = 55,047.99 : x
  2. Step 2: Convert to fraction form
    100,372.76/138,516.24 = 55,047.99/x
  3. Step 3: Cross multiply
    100,372.76x = 138,516.24 × 55,047.99
  4. Step 4: Simplify right side
    100,372.76x = 7,625,040,594.36
  5. Step 5: Solve for x
    x = 7,625,040,594.36/100,372.76
  6. Step 6: Final answer
    x = 75,967.23

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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.