Home / 71,972.55-99,315.21-40,143.54

Finding the Fourth Proportional to 71,972.55, 99,315.21 and 40,143.54

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Solution

The fourth proportional to 71,972.55, 99,315.21 and 40,143.54 is: 55,394.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,972.55 : 99,315.21 = 40,143.54 : x
  2. Step 2: Convert to fraction form
    71,972.55/99,315.21 = 40,143.54/x
  3. Step 3: Cross multiply
    71,972.55x = 99,315.21 × 40,143.54
  4. Step 4: Simplify right side
    71,972.55x = 3,986,864,105.24
  5. Step 5: Solve for x
    x = 3,986,864,105.24/71,972.55
  6. Step 6: Final answer
    x = 55,394.23

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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.