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Finding the Fourth Proportional to 57,860.45, 86,711.85 and 35,379

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Solution

The fourth proportional to 57,860.45, 86,711.85 and 35,379 is: 53,020.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,860.45 : 86,711.85 = 35,379 : x
  2. Step 2: Convert to fraction form
    57,860.45/86,711.85 = 35,379/x
  3. Step 3: Cross multiply
    57,860.45x = 86,711.85 × 35,379
  4. Step 4: Simplify right side
    57,860.45x = 3,067,778,541.15
  5. Step 5: Solve for x
    x = 3,067,778,541.15/57,860.45
  6. Step 6: Final answer
    x = 53,020.30

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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.