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Finding the Fourth Proportional to 71,792.58, 99,072.72 and 39,961.44

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Solution

The fourth proportional to 71,792.58, 99,072.72 and 39,961.44 is: 55,146.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,792.58 : 99,072.72 = 39,961.44 : x
  2. Step 2: Convert to fraction form
    71,792.58/99,072.72 = 39,961.44/x
  3. Step 3: Cross multiply
    71,792.58x = 99,072.72 × 39,961.44
  4. Step 4: Simplify right side
    71,792.58x = 3,959,088,555.92
  5. Step 5: Solve for x
    x = 3,959,088,555.92/71,792.58
  6. Step 6: Final answer
    x = 55,146.21

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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.