Home / 212,899.92-319,393.08-79,777.68

Finding the Fourth Proportional to 212,899.92, 319,393.08 and 79,777.68

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Solution

The fourth proportional to 212,899.92, 319,393.08 and 79,777.68 is: 119,682.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,899.92 : 319,393.08 = 79,777.68 : x
  2. Step 2: Convert to fraction form
    212,899.92/319,393.08 = 79,777.68/x
  3. Step 3: Cross multiply
    212,899.92x = 319,393.08 × 79,777.68
  4. Step 4: Simplify right side
    212,899.92x = 25,480,438,930.45
  5. Step 5: Solve for x
    x = 25,480,438,930.45/212,899.92
  6. Step 6: Final answer
    x = 119,682.71

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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.