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Finding the Fourth Proportional to 108,017.87, 161,872.37 and 79,329.80

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Solution

The fourth proportional to 108,017.87, 161,872.37 and 79,329.80 is: 118,881.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,017.87 : 161,872.37 = 79,329.80 : x
  2. Step 2: Convert to fraction form
    108,017.87/161,872.37 = 79,329.80/x
  3. Step 3: Cross multiply
    108,017.87x = 161,872.37 × 79,329.80
  4. Step 4: Simplify right side
    108,017.87x = 12,841,301,531.62
  5. Step 5: Solve for x
    x = 12,841,301,531.62/108,017.87
  6. Step 6: Final answer
    x = 118,881.28

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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.