Home / 71,839.85-99,142.06-40,008.74

Finding the Fourth Proportional to 71,839.85, 99,142.06 and 40,008.74

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Solution

The fourth proportional to 71,839.85, 99,142.06 and 40,008.74 is: 55,213.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,839.85 : 99,142.06 = 40,008.74 : x
  2. Step 2: Convert to fraction form
    71,839.85/99,142.06 = 40,008.74/x
  3. Step 3: Cross multiply
    71,839.85x = 99,142.06 × 40,008.74
  4. Step 4: Simplify right side
    71,839.85x = 3,966,549,329.92
  5. Step 5: Solve for x
    x = 3,966,549,329.92/71,839.85
  6. Step 6: Final answer
    x = 55,213.78

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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.