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Finding the Fourth Proportional to 71,894.34, 99,209.88 and 40,057.56

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Solution

The fourth proportional to 71,894.34, 99,209.88 and 40,057.56 is: 55,277.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,894.34 : 99,209.88 = 40,057.56 : x
  2. Step 2: Convert to fraction form
    71,894.34/99,209.88 = 40,057.56/x
  3. Step 3: Cross multiply
    71,894.34x = 99,209.88 × 40,057.56
  4. Step 4: Simplify right side
    71,894.34x = 3,974,105,720.69
  5. Step 5: Solve for x
    x = 3,974,105,720.69/71,894.34
  6. Step 6: Final answer
    x = 55,277.03

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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.