Home / 120,129.48-165,773.47-65,680.65

Finding the Fourth Proportional to 120,129.48, 165,773.47 and 65,680.65

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Solution

The fourth proportional to 120,129.48, 165,773.47 and 65,680.65 is: 90,636.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,129.48 : 165,773.47 = 65,680.65 : x
  2. Step 2: Convert to fraction form
    120,129.48/165,773.47 = 65,680.65/x
  3. Step 3: Cross multiply
    120,129.48x = 165,773.47 × 65,680.65
  4. Step 4: Simplify right side
    120,129.48x = 10,888,108,105.08
  5. Step 5: Solve for x
    x = 10,888,108,105.08/120,129.48
  6. Step 6: Final answer
    x = 90,636.44

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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.