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Finding the Fourth Proportional to 79,169.40, 109,266.12 and 45,177.84

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Solution

The fourth proportional to 79,169.40, 109,266.12 and 45,177.84 is: 62,352.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,169.40 : 109,266.12 = 45,177.84 : x
  2. Step 2: Convert to fraction form
    79,169.40/109,266.12 = 45,177.84/x
  3. Step 3: Cross multiply
    79,169.40x = 109,266.12 × 45,177.84
  4. Step 4: Simplify right side
    79,169.40x = 4,936,407,286.78
  5. Step 5: Solve for x
    x = 4,936,407,286.78/79,169.40
  6. Step 6: Final answer
    x = 62,352.47

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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.