Home / 66,165.12-91,305.20-39,306.88

Finding the Fourth Proportional to 66,165.12, 91,305.20 and 39,306.88

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Solution

The fourth proportional to 66,165.12, 91,305.20 and 39,306.88 is: 54,241.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,165.12 : 91,305.20 = 39,306.88 : x
  2. Step 2: Convert to fraction form
    66,165.12/91,305.20 = 39,306.88/x
  3. Step 3: Cross multiply
    66,165.12x = 91,305.20 × 39,306.88
  4. Step 4: Simplify right side
    66,165.12x = 3,588,922,539.78
  5. Step 5: Solve for x
    x = 3,588,922,539.78/66,165.12
  6. Step 6: Final answer
    x = 54,241.91

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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.