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Finding the Fourth Proportional to 108,028.80, 161,985.60 and 45,628.80

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Solution

The fourth proportional to 108,028.80, 161,985.60 and 45,628.80 is: 68,418.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,028.80 : 161,985.60 = 45,628.80 : x
  2. Step 2: Convert to fraction form
    108,028.80/161,985.60 = 45,628.80/x
  3. Step 3: Cross multiply
    108,028.80x = 161,985.60 × 45,628.80
  4. Step 4: Simplify right side
    108,028.80x = 7,391,208,545.28
  5. Step 5: Solve for x
    x = 7,391,208,545.28/108,028.80
  6. Step 6: Final answer
    x = 68,418.87

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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.