Home / 71,972.27-99,321.91-40,143.23

Finding the Fourth Proportional to 71,972.27, 99,321.91 and 40,143.23

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Solution

The fourth proportional to 71,972.27, 99,321.91 and 40,143.23 is: 55,397.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,972.27 : 99,321.91 = 40,143.23 : x
  2. Step 2: Convert to fraction form
    71,972.27/99,321.91 = 40,143.23/x
  3. Step 3: Cross multiply
    71,972.27x = 99,321.91 × 40,143.23
  4. Step 4: Simplify right side
    71,972.27x = 3,987,101,928.51
  5. Step 5: Solve for x
    x = 3,987,101,928.51/71,972.27
  6. Step 6: Final answer
    x = 55,397.75

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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.