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Finding the Fourth Proportional to 66,568.61, 91,876.55 and 39,343.59

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Solution

The fourth proportional to 66,568.61, 91,876.55 and 39,343.59 is: 54,301.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,568.61 : 91,876.55 = 39,343.59 : x
  2. Step 2: Convert to fraction form
    66,568.61/91,876.55 = 39,343.59/x
  3. Step 3: Cross multiply
    66,568.61x = 91,876.55 × 39,343.59
  4. Step 4: Simplify right side
    66,568.61x = 3,614,753,117.10
  5. Step 5: Solve for x
    x = 3,614,753,117.10/66,568.61
  6. Step 6: Final answer
    x = 54,301.17

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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.