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Finding the Fourth Proportional to 71,881.88, 99,197.67 and 39,617.67

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Solution

The fourth proportional to 71,881.88, 99,197.67 and 39,617.67 is: 54,672.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,881.88 : 99,197.67 = 39,617.67 : x
  2. Step 2: Convert to fraction form
    71,881.88/99,197.67 = 39,617.67/x
  3. Step 3: Cross multiply
    71,881.88x = 99,197.67 × 39,617.67
  4. Step 4: Simplify right side
    71,881.88x = 3,929,980,554.83
  5. Step 5: Solve for x
    x = 3,929,980,554.83/71,881.88
  6. Step 6: Final answer
    x = 54,672.76

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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.