Home / 78,321.49-117,324.23-36,142.98

Finding the Fourth Proportional to 78,321.49, 117,324.23 and 36,142.98

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Solution

The fourth proportional to 78,321.49, 117,324.23 and 36,142.98 is: 54,141.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,321.49 : 117,324.23 = 36,142.98 : x
  2. Step 2: Convert to fraction form
    78,321.49/117,324.23 = 36,142.98/x
  3. Step 3: Cross multiply
    78,321.49x = 117,324.23 × 36,142.98
  4. Step 4: Simplify right side
    78,321.49x = 4,240,447,540.98
  5. Step 5: Solve for x
    x = 4,240,447,540.98/78,321.49
  6. Step 6: Final answer
    x = 54,141.56

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1.5x scale

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.