Home / 100,234.72-138,320.29-57,216.43

Finding the Fourth Proportional to 100,234.72, 138,320.29 and 57,216.43

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Solution

The fourth proportional to 100,234.72, 138,320.29 and 57,216.43 is: 78,956.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,234.72 : 138,320.29 = 57,216.43 : x
  2. Step 2: Convert to fraction form
    100,234.72/138,320.29 = 57,216.43/x
  3. Step 3: Cross multiply
    100,234.72x = 138,320.29 × 57,216.43
  4. Step 4: Simplify right side
    100,234.72x = 7,914,193,190.36
  5. Step 5: Solve for x
    x = 7,914,193,190.36/100,234.72
  6. Step 6: Final answer
    x = 78,956.60

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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.