Home / 107,821.20-161,877.60-68,455.20

Finding the Fourth Proportional to 107,821.20, 161,877.60 and 68,455.20

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Solution

The fourth proportional to 107,821.20, 161,877.60 and 68,455.20 is: 102,775.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,821.20 : 161,877.60 = 68,455.20 : x
  2. Step 2: Convert to fraction form
    107,821.20/161,877.60 = 68,455.20/x
  3. Step 3: Cross multiply
    107,821.20x = 161,877.60 × 68,455.20
  4. Step 4: Simplify right side
    107,821.20x = 11,081,363,483.52
  5. Step 5: Solve for x
    x = 11,081,363,483.52/107,821.20
  6. Step 6: Final answer
    x = 102,775.37

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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.