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Finding the Fourth Proportional to 71,761.94, 99,031.47 and 39,932.89

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Solution

The fourth proportional to 71,761.94, 99,031.47 and 39,932.89 is: 55,107.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,761.94 : 99,031.47 = 39,932.89 : x
  2. Step 2: Convert to fraction form
    71,761.94/99,031.47 = 39,932.89/x
  3. Step 3: Cross multiply
    71,761.94x = 99,031.47 × 39,932.89
  4. Step 4: Simplify right side
    71,761.94x = 3,954,612,798.05
  5. Step 5: Solve for x
    x = 3,954,612,798.05/71,761.94
  6. Step 6: Final answer
    x = 55,107.38

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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.