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Finding the Fourth Proportional to 85,693.42, 128,461.41 and 29,520.17

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Solution

The fourth proportional to 85,693.42, 128,461.41 and 29,520.17 is: 44,253.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,693.42 : 128,461.41 = 29,520.17 : x
  2. Step 2: Convert to fraction form
    85,693.42/128,461.41 = 29,520.17/x
  3. Step 3: Cross multiply
    85,693.42x = 128,461.41 × 29,520.17
  4. Step 4: Simplify right side
    85,693.42x = 3,792,202,661.64
  5. Step 5: Solve for x
    x = 3,792,202,661.64/85,693.42
  6. Step 6: Final answer
    x = 44,253.14

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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.