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Finding the Fourth Proportional to 66,514.44, 91,808.64 and 39,315.72

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Solution

The fourth proportional to 66,514.44, 91,808.64 and 39,315.72 is: 54,266.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,514.44 : 91,808.64 = 39,315.72 : x
  2. Step 2: Convert to fraction form
    66,514.44/91,808.64 = 39,315.72/x
  3. Step 3: Cross multiply
    66,514.44x = 91,808.64 × 39,315.72
  4. Step 4: Simplify right side
    66,514.44x = 3,609,522,783.82
  5. Step 5: Solve for x
    x = 3,609,522,783.82/66,514.44
  6. Step 6: Final answer
    x = 54,266.75

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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.