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Finding the Fourth Proportional to 66,681.60, 92,041.60 and 39,843.84

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Solution

The fourth proportional to 66,681.60, 92,041.60 and 39,843.84 is: 54,997.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,681.60 : 92,041.60 = 39,843.84 : x
  2. Step 2: Convert to fraction form
    66,681.60/92,041.60 = 39,843.84/x
  3. Step 3: Cross multiply
    66,681.60x = 92,041.60 × 39,843.84
  4. Step 4: Simplify right side
    66,681.60x = 3,667,290,783.74
  5. Step 5: Solve for x
    x = 3,667,290,783.74/66,681.60
  6. Step 6: Final answer
    x = 54,997.04

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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.