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Finding the Fourth Proportional to 45,857.73, 68,781.21 and 12,581.16

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Solution

The fourth proportional to 45,857.73, 68,781.21 and 12,581.16 is: 18,870.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,857.73 : 68,781.21 = 12,581.16 : x
  2. Step 2: Convert to fraction form
    45,857.73/68,781.21 = 12,581.16/x
  3. Step 3: Cross multiply
    45,857.73x = 68,781.21 × 12,581.16
  4. Step 4: Simplify right side
    45,857.73x = 865,347,408.00
  5. Step 5: Solve for x
    x = 865,347,408.00/45,857.73
  6. Step 6: Final answer
    x = 18,870.26

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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.