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Finding the Fourth Proportional to 57,281.80, 85,849.80 and 51,012.40

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Solution

The fourth proportional to 57,281.80, 85,849.80 and 51,012.40 is: 76,453.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,281.80 : 85,849.80 = 51,012.40 : x
  2. Step 2: Convert to fraction form
    57,281.80/85,849.80 = 51,012.40/x
  3. Step 3: Cross multiply
    57,281.80x = 85,849.80 × 51,012.40
  4. Step 4: Simplify right side
    57,281.80x = 4,379,404,337.52
  5. Step 5: Solve for x
    x = 4,379,404,337.52/57,281.80
  6. Step 6: Final answer
    x = 76,453.68

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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.