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Finding the Fourth Proportional to 71,772.06, 99,044.72 and 39,940.42

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Solution

The fourth proportional to 71,772.06, 99,044.72 and 39,940.42 is: 55,117.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,772.06 : 99,044.72 = 39,940.42 : x
  2. Step 2: Convert to fraction form
    71,772.06/99,044.72 = 39,940.42/x
  3. Step 3: Cross multiply
    71,772.06x = 99,044.72 × 39,940.42
  4. Step 4: Simplify right side
    71,772.06x = 3,955,887,715.58
  5. Step 5: Solve for x
    x = 3,955,887,715.58/71,772.06
  6. Step 6: Final answer
    x = 55,117.38

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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.