Home / 78,109.48-117,139.97-28,183.07

Finding the Fourth Proportional to 78,109.48, 117,139.97 and 28,183.07

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Solution

The fourth proportional to 78,109.48, 117,139.97 and 28,183.07 is: 42,265.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,109.48 : 117,139.97 = 28,183.07 : x
  2. Step 2: Convert to fraction form
    78,109.48/117,139.97 = 28,183.07/x
  3. Step 3: Cross multiply
    78,109.48x = 117,139.97 × 28,183.07
  4. Step 4: Simplify right side
    78,109.48x = 3,301,364,337.62
  5. Step 5: Solve for x
    x = 3,301,364,337.62/78,109.48
  6. Step 6: Final answer
    x = 42,265.86

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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.