Home / 71,971.77-99,321.22-40,142.73

Finding the Fourth Proportional to 71,971.77, 99,321.22 and 40,142.73

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Solution

The fourth proportional to 71,971.77, 99,321.22 and 40,142.73 is: 55,397.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,971.77 : 99,321.22 = 40,142.73 : x
  2. Step 2: Convert to fraction form
    71,971.77/99,321.22 = 40,142.73/x
  3. Step 3: Cross multiply
    71,971.77x = 99,321.22 × 40,142.73
  4. Step 4: Simplify right side
    71,971.77x = 3,987,024,717.02
  5. Step 5: Solve for x
    x = 3,987,024,717.02/71,971.77
  6. Step 6: Final answer
    x = 55,397.06

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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.