Home / 71,839.22-99,128.37-40,001.78

Finding the Fourth Proportional to 71,839.22, 99,128.37 and 40,001.78

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Solution

The fourth proportional to 71,839.22, 99,128.37 and 40,001.78 is: 55,197.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,839.22 : 99,128.37 = 40,001.78 : x
  2. Step 2: Convert to fraction form
    71,839.22/99,128.37 = 40,001.78/x
  3. Step 3: Cross multiply
    71,839.22x = 99,128.37 × 40,001.78
  4. Step 4: Simplify right side
    71,839.22x = 3,965,311,248.50
  5. Step 5: Solve for x
    x = 3,965,311,248.50/71,839.22
  6. Step 6: Final answer
    x = 55,197.03

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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.