Home / 51,178.30-76,709.21-31,143.60

Finding the Fourth Proportional to 51,178.30, 76,709.21 and 31,143.60

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Solution

The fourth proportional to 51,178.30, 76,709.21 and 31,143.60 is: 46,679.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,178.30 : 76,709.21 = 31,143.60 : x
  2. Step 2: Convert to fraction form
    51,178.30/76,709.21 = 31,143.60/x
  3. Step 3: Cross multiply
    51,178.30x = 76,709.21 × 31,143.60
  4. Step 4: Simplify right side
    51,178.30x = 2,389,001,222.19
  5. Step 5: Solve for x
    x = 2,389,001,222.19/51,178.30
  6. Step 6: Final answer
    x = 46,679.97

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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.