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Finding the Fourth Proportional to 66,805.62, 92,128.12 and 39,943.77

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Solution

The fourth proportional to 66,805.62, 92,128.12 and 39,943.77 is: 55,084.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,805.62 : 92,128.12 = 39,943.77 : x
  2. Step 2: Convert to fraction form
    66,805.62/92,128.12 = 39,943.77/x
  3. Step 3: Cross multiply
    66,805.62x = 92,128.12 × 39,943.77
  4. Step 4: Simplify right side
    66,805.62x = 3,679,944,435.81
  5. Step 5: Solve for x
    x = 3,679,944,435.81/66,805.62
  6. Step 6: Final answer
    x = 55,084.35

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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.