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Finding the Fourth Proportional to 66,385.28, 91,592.16 and 39,514.28

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Solution

The fourth proportional to 66,385.28, 91,592.16 and 39,514.28 is: 54,518.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,385.28 : 91,592.16 = 39,514.28 : x
  2. Step 2: Convert to fraction form
    66,385.28/91,592.16 = 39,514.28/x
  3. Step 3: Cross multiply
    66,385.28x = 91,592.16 × 39,514.28
  4. Step 4: Simplify right side
    66,385.28x = 3,619,198,256.04
  5. Step 5: Solve for x
    x = 3,619,198,256.04/66,385.28
  6. Step 6: Final answer
    x = 54,518.08

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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.