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Finding the Fourth Proportional to 100,179.56, 138,247.80 and 57,740.83

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Solution

The fourth proportional to 100,179.56, 138,247.80 and 57,740.83 is: 79,682.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,179.56 : 138,247.80 = 57,740.83 : x
  2. Step 2: Convert to fraction form
    100,179.56/138,247.80 = 57,740.83/x
  3. Step 3: Cross multiply
    100,179.56x = 138,247.80 × 57,740.83
  4. Step 4: Simplify right side
    100,179.56x = 7,982,542,372.05
  5. Step 5: Solve for x
    x = 7,982,542,372.05/100,179.56
  6. Step 6: Final answer
    x = 79,682.34

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1.5x scale

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.