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Finding the Fourth Proportional to 124,555, 171,885.94 and 79,843

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Solution

The fourth proportional to 124,555, 171,885.94 and 79,843 is: 110,183.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,555 : 171,885.94 = 79,843 : x
  2. Step 2: Convert to fraction form
    124,555/171,885.94 = 79,843/x
  3. Step 3: Cross multiply
    124,555x = 171,885.94 × 79,843
  4. Step 4: Simplify right side
    124,555x = 13,723,889,107.42
  5. Step 5: Solve for x
    x = 13,723,889,107.42/124,555
  6. Step 6: Final answer
    x = 110,183.37

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1.5x scale

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.