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Finding the Fourth Proportional to 279,785.80, 419,775.90 and 122,127.40

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Solution

The fourth proportional to 279,785.80, 419,775.90 and 122,127.40 is: 183,233.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,785.80 : 419,775.90 = 122,127.40 : x
  2. Step 2: Convert to fraction form
    279,785.80/419,775.90 = 122,127.40/x
  3. Step 3: Cross multiply
    279,785.80x = 419,775.90 × 122,127.40
  4. Step 4: Simplify right side
    279,785.80x = 51,266,139,249.66
  5. Step 5: Solve for x
    x = 51,266,139,249.66/279,785.80
  6. Step 6: Final answer
    x = 183,233.53

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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.