Home / 57,135.31-85,670.89-39,143.85

Finding the Fourth Proportional to 57,135.31, 85,670.89 and 39,143.85

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Solution

The fourth proportional to 57,135.31, 85,670.89 and 39,143.85 is: 58,693.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,135.31 : 85,670.89 = 39,143.85 : x
  2. Step 2: Convert to fraction form
    57,135.31/85,670.89 = 39,143.85/x
  3. Step 3: Cross multiply
    57,135.31x = 85,670.89 × 39,143.85
  4. Step 4: Simplify right side
    57,135.31x = 3,353,488,369.67
  5. Step 5: Solve for x
    x = 3,353,488,369.67/57,135.31
  6. Step 6: Final answer
    x = 58,693.80

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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.