Home / 57,154.62-78,876.34-31,663.78

Finding the Fourth Proportional to 57,154.62, 78,876.34 and 31,663.78

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Solution

The fourth proportional to 57,154.62, 78,876.34 and 31,663.78 is: 43,697.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,154.62 : 78,876.34 = 31,663.78 : x
  2. Step 2: Convert to fraction form
    57,154.62/78,876.34 = 31,663.78/x
  3. Step 3: Cross multiply
    57,154.62x = 78,876.34 × 31,663.78
  4. Step 4: Simplify right side
    57,154.62x = 2,497,523,076.97
  5. Step 5: Solve for x
    x = 2,497,523,076.97/57,154.62
  6. Step 6: Final answer
    x = 43,697.66

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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.