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Finding the Fourth Proportional to 66,654.80, 91,986.40 and 38,360.56

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Solution

The fourth proportional to 66,654.80, 91,986.40 and 38,360.56 is: 52,939.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,654.80 : 91,986.40 = 38,360.56 : x
  2. Step 2: Convert to fraction form
    66,654.80/91,986.40 = 38,360.56/x
  3. Step 3: Cross multiply
    66,654.80x = 91,986.40 × 38,360.56
  4. Step 4: Simplify right side
    66,654.80x = 3,528,649,816.38
  5. Step 5: Solve for x
    x = 3,528,649,816.38/66,654.80
  6. Step 6: Final answer
    x = 52,939.17

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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.