Home / 78,399.15-117,613.30-25,812.33

Finding the Fourth Proportional to 78,399.15, 117,613.30 and 25,812.33

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Solution

The fourth proportional to 78,399.15, 117,613.30 and 25,812.33 is: 38,723.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,399.15 : 117,613.30 = 25,812.33 : x
  2. Step 2: Convert to fraction form
    78,399.15/117,613.30 = 25,812.33/x
  3. Step 3: Cross multiply
    78,399.15x = 117,613.30 × 25,812.33
  4. Step 4: Simplify right side
    78,399.15x = 3,035,873,311.99
  5. Step 5: Solve for x
    x = 3,035,873,311.99/78,399.15
  6. Step 6: Final answer
    x = 38,723.29

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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.