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Finding the Fourth Proportional to 99,540.80, 137,361.12 and 61,814.24

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Solution

The fourth proportional to 99,540.80, 137,361.12 and 61,814.24 is: 85,300.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,540.80 : 137,361.12 = 61,814.24 : x
  2. Step 2: Convert to fraction form
    99,540.80/137,361.12 = 61,814.24/x
  3. Step 3: Cross multiply
    99,540.80x = 137,361.12 × 61,814.24
  4. Step 4: Simplify right side
    99,540.80x = 8,490,873,238.35
  5. Step 5: Solve for x
    x = 8,490,873,238.35/99,540.80
  6. Step 6: Final answer
    x = 85,300.43

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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.