Home / 71,839.39-99,138.55-40,008.22

Finding the Fourth Proportional to 71,839.39, 99,138.55 and 40,008.22

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Solution

The fourth proportional to 71,839.39, 99,138.55 and 40,008.22 is: 55,211.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,839.39 : 99,138.55 = 40,008.22 : x
  2. Step 2: Convert to fraction form
    71,839.39/99,138.55 = 40,008.22/x
  3. Step 3: Cross multiply
    71,839.39x = 99,138.55 × 40,008.22
  4. Step 4: Simplify right side
    71,839.39x = 3,966,356,918.88
  5. Step 5: Solve for x
    x = 3,966,356,918.88/71,839.39
  6. Step 6: Final answer
    x = 55,211.45

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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.