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Finding the Fourth Proportional to 135,359.88, 202,971.47 and 79,216.85

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Solution

The fourth proportional to 135,359.88, 202,971.47 and 79,216.85 is: 118,785.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,359.88 : 202,971.47 = 79,216.85 : x
  2. Step 2: Convert to fraction form
    135,359.88/202,971.47 = 79,216.85/x
  3. Step 3: Cross multiply
    135,359.88x = 202,971.47 × 79,216.85
  4. Step 4: Simplify right side
    135,359.88x = 16,078,761,050.21
  5. Step 5: Solve for x
    x = 16,078,761,050.21/135,359.88
  6. Step 6: Final answer
    x = 118,785.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.