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Finding the Fourth Proportional to 243,694.11, 365,421.29 and 85,899.63

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Solution

The fourth proportional to 243,694.11, 365,421.29 and 85,899.63 is: 128,807.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,694.11 : 365,421.29 = 85,899.63 : x
  2. Step 2: Convert to fraction form
    243,694.11/365,421.29 = 85,899.63/x
  3. Step 3: Cross multiply
    243,694.11x = 365,421.29 × 85,899.63
  4. Step 4: Simplify right side
    243,694.11x = 31,389,553,175.62
  5. Step 5: Solve for x
    x = 31,389,553,175.62/243,694.11
  6. Step 6: Final answer
    x = 128,807.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.