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Finding the Fourth Proportional to 71,974.07, 99,324.21 and 40,142.99

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Solution

The fourth proportional to 71,974.07, 99,324.21 and 40,142.99 is: 55,397.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,974.07 : 99,324.21 = 40,142.99 : x
  2. Step 2: Convert to fraction form
    71,974.07/99,324.21 = 40,142.99/x
  3. Step 3: Cross multiply
    71,974.07x = 99,324.21 × 40,142.99
  4. Step 4: Simplify right side
    71,974.07x = 3,987,170,071.45
  5. Step 5: Solve for x
    x = 3,987,170,071.45/71,974.07
  6. Step 6: Final answer
    x = 55,397.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.