Home / 78,781.08-118,189.20-28,860.12

Finding the Fourth Proportional to 78,781.08, 118,189.20 and 28,860.12

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Solution

The fourth proportional to 78,781.08, 118,189.20 and 28,860.12 is: 43,296.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,781.08 : 118,189.20 = 28,860.12 : x
  2. Step 2: Convert to fraction form
    78,781.08/118,189.20 = 28,860.12/x
  3. Step 3: Cross multiply
    78,781.08x = 118,189.20 × 28,860.12
  4. Step 4: Simplify right side
    78,781.08x = 3,410,954,494.70
  5. Step 5: Solve for x
    x = 3,410,954,494.70/78,781.08
  6. Step 6: Final answer
    x = 43,296.62

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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.