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Finding the Fourth Proportional to 80,661.69, 121,008.70 and 45,173.49

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Solution

The fourth proportional to 80,661.69, 121,008.70 and 45,173.49 is: 67,769.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,661.69 : 121,008.70 = 45,173.49 : x
  2. Step 2: Convert to fraction form
    80,661.69/121,008.70 = 45,173.49/x
  3. Step 3: Cross multiply
    80,661.69x = 121,008.70 × 45,173.49
  4. Step 4: Simplify right side
    80,661.69x = 5,466,385,299.36
  5. Step 5: Solve for x
    x = 5,466,385,299.36/80,661.69
  6. Step 6: Final answer
    x = 67,769.29

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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.