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Finding the Fourth Proportional to 71,750.46, 99,020.37 and 39,919.43

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Solution

The fourth proportional to 71,750.46, 99,020.37 and 39,919.43 is: 55,091.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,750.46 : 99,020.37 = 39,919.43 : x
  2. Step 2: Convert to fraction form
    71,750.46/99,020.37 = 39,919.43/x
  3. Step 3: Cross multiply
    71,750.46x = 99,020.37 × 39,919.43
  4. Step 4: Simplify right side
    71,750.46x = 3,952,837,126.04
  5. Step 5: Solve for x
    x = 3,952,837,126.04/71,750.46
  6. Step 6: Final answer
    x = 55,091.45

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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.