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Finding the Fourth Proportional to 51,055, 70,455.90 and 28,699

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Solution

The fourth proportional to 51,055, 70,455.90 and 28,699 is: 39,604.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,055 : 70,455.90 = 28,699 : x
  2. Step 2: Convert to fraction form
    51,055/70,455.90 = 28,699/x
  3. Step 3: Cross multiply
    51,055x = 70,455.90 × 28,699
  4. Step 4: Simplify right side
    51,055x = 2,022,013,874.10
  5. Step 5: Solve for x
    x = 2,022,013,874.10/51,055
  6. Step 6: Final answer
    x = 39,604.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.