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Finding the Fourth Proportional to 57,002.40, 85,515.40 and 28,553.96

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Solution

The fourth proportional to 57,002.40, 85,515.40 and 28,553.96 is: 42,836.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,002.40 : 85,515.40 = 28,553.96 : x
  2. Step 2: Convert to fraction form
    57,002.40/85,515.40 = 28,553.96/x
  3. Step 3: Cross multiply
    57,002.40x = 85,515.40 × 28,553.96
  4. Step 4: Simplify right side
    57,002.40x = 2,441,803,310.98
  5. Step 5: Solve for x
    x = 2,441,803,310.98/57,002.40
  6. Step 6: Final answer
    x = 42,836.85

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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.