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Finding the Fourth Proportional to 108,488, 149,671.68 and 68,185.28

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Solution

The fourth proportional to 108,488, 149,671.68 and 68,185.28 is: 94,069.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,488 : 149,671.68 = 68,185.28 : x
  2. Step 2: Convert to fraction form
    108,488/149,671.68 = 68,185.28/x
  3. Step 3: Cross multiply
    108,488x = 149,671.68 × 68,185.28
  4. Step 4: Simplify right side
    108,488x = 10,205,405,408.87
  5. Step 5: Solve for x
    x = 10,205,405,408.87/108,488
  6. Step 6: Final answer
    x = 94,069.44

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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.