Home / 212,961.28-319,404.45-77,997.46

Finding the Fourth Proportional to 212,961.28, 319,404.45 and 77,997.46

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Solution

The fourth proportional to 212,961.28, 319,404.45 and 77,997.46 is: 116,982.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,961.28 : 319,404.45 = 77,997.46 : x
  2. Step 2: Convert to fraction form
    212,961.28/319,404.45 = 77,997.46/x
  3. Step 3: Cross multiply
    212,961.28x = 319,404.45 × 77,997.46
  4. Step 4: Simplify right side
    212,961.28x = 24,912,733,825.69
  5. Step 5: Solve for x
    x = 24,912,733,825.69/212,961.28
  6. Step 6: Final answer
    x = 116,982.46

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1.5x scale

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.