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Finding the Fourth Proportional to 121,491.40, 182,157.90 and 109,049.80

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Solution

The fourth proportional to 121,491.40, 182,157.90 and 109,049.80 is: 163,503.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,491.40 : 182,157.90 = 109,049.80 : x
  2. Step 2: Convert to fraction form
    121,491.40/182,157.90 = 109,049.80/x
  3. Step 3: Cross multiply
    121,491.40x = 182,157.90 × 109,049.80
  4. Step 4: Simplify right side
    121,491.40x = 19,864,282,563.42
  5. Step 5: Solve for x
    x = 19,864,282,563.42/121,491.40
  6. Step 6: Final answer
    x = 163,503.61

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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.