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Finding the Fourth Proportional to 57,418.61, 85,911.46 and 51,591.47

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Solution

The fourth proportional to 57,418.61, 85,911.46 and 51,591.47 is: 77,192.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,418.61 : 85,911.46 = 51,591.47 : x
  2. Step 2: Convert to fraction form
    57,418.61/85,911.46 = 51,591.47/x
  3. Step 3: Cross multiply
    57,418.61x = 85,911.46 × 51,591.47
  4. Step 4: Simplify right side
    57,418.61x = 4,432,297,952.71
  5. Step 5: Solve for x
    x = 4,432,297,952.71/57,418.61
  6. Step 6: Final answer
    x = 77,192.71

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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.