Home / 57,042-78,719.68-31,891.60

Finding the Fourth Proportional to 57,042, 78,719.68 and 31,891.60

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Solution

The fourth proportional to 57,042, 78,719.68 and 31,891.60 is: 44,011.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,042 : 78,719.68 = 31,891.60 : x
  2. Step 2: Convert to fraction form
    57,042/78,719.68 = 31,891.60/x
  3. Step 3: Cross multiply
    57,042x = 78,719.68 × 31,891.60
  4. Step 4: Simplify right side
    57,042x = 2,510,496,546.69
  5. Step 5: Solve for x
    x = 2,510,496,546.69/57,042
  6. Step 6: Final answer
    x = 44,011.37

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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.