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Finding the Fourth Proportional to 57,745.61, 86,621.48 and 18,305.81

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Solution

The fourth proportional to 57,745.61, 86,621.48 and 18,305.81 is: 27,459.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,745.61 : 86,621.48 = 18,305.81 : x
  2. Step 2: Convert to fraction form
    57,745.61/86,621.48 = 18,305.81/x
  3. Step 3: Cross multiply
    57,745.61x = 86,621.48 × 18,305.81
  4. Step 4: Simplify right side
    57,745.61x = 1,585,676,354.80
  5. Step 5: Solve for x
    x = 1,585,676,354.80/57,745.61
  6. Step 6: Final answer
    x = 27,459.69

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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.