Home / 78,015.29-117,022.32-40,556.03

Finding the Fourth Proportional to 78,015.29, 117,022.32 and 40,556.03

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Solution

The fourth proportional to 78,015.29, 117,022.32 and 40,556.03 is: 60,833.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,015.29 : 117,022.32 = 40,556.03 : x
  2. Step 2: Convert to fraction form
    78,015.29/117,022.32 = 40,556.03/x
  3. Step 3: Cross multiply
    78,015.29x = 117,022.32 × 40,556.03
  4. Step 4: Simplify right side
    78,015.29x = 4,745,960,135.48
  5. Step 5: Solve for x
    x = 4,745,960,135.48/78,015.29
  6. Step 6: Final answer
    x = 60,833.72

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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.