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Finding the Fourth Proportional to 66,205.68, 91,393.29 and 39,356.88

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Solution

The fourth proportional to 66,205.68, 91,393.29 and 39,356.88 is: 54,330.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,205.68 : 91,393.29 = 39,356.88 : x
  2. Step 2: Convert to fraction form
    66,205.68/91,393.29 = 39,356.88/x
  3. Step 3: Cross multiply
    66,205.68x = 91,393.29 × 39,356.88
  4. Step 4: Simplify right side
    66,205.68x = 3,596,954,747.34
  5. Step 5: Solve for x
    x = 3,596,954,747.34/66,205.68
  6. Step 6: Final answer
    x = 54,330.00

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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.