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Finding the Fourth Proportional to 79,209.71, 109,305.21 and 45,216.84

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Solution

The fourth proportional to 79,209.71, 109,305.21 and 45,216.84 is: 62,396.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,209.71 : 109,305.21 = 45,216.84 : x
  2. Step 2: Convert to fraction form
    79,209.71/109,305.21 = 45,216.84/x
  3. Step 3: Cross multiply
    79,209.71x = 109,305.21 × 45,216.84
  4. Step 4: Simplify right side
    79,209.71x = 4,942,436,191.74
  5. Step 5: Solve for x
    x = 4,942,436,191.74/79,209.71
  6. Step 6: Final answer
    x = 62,396.85

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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.