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Finding the Fourth Proportional to 108,464.40, 149,689.52 and 79,914.49

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Solution

The fourth proportional to 108,464.40, 149,689.52 and 79,914.49 is: 110,288.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,464.40 : 149,689.52 = 79,914.49 : x
  2. Step 2: Convert to fraction form
    108,464.40/149,689.52 = 79,914.49/x
  3. Step 3: Cross multiply
    108,464.40x = 149,689.52 × 79,914.49
  4. Step 4: Simplify right side
    108,464.40x = 11,962,361,175.03
  5. Step 5: Solve for x
    x = 11,962,361,175.03/108,464.40
  6. Step 6: Final answer
    x = 110,288.36

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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.