Home / 80,665.69-121,014.70-45,177.49

Finding the Fourth Proportional to 80,665.69, 121,014.70 and 45,177.49

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Solution

The fourth proportional to 80,665.69, 121,014.70 and 45,177.49 is: 67,775.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,665.69 : 121,014.70 = 45,177.49 : x
  2. Step 2: Convert to fraction form
    80,665.69/121,014.70 = 45,177.49/x
  3. Step 3: Cross multiply
    80,665.69x = 121,014.70 × 45,177.49
  4. Step 4: Simplify right side
    80,665.69x = 5,467,140,399.10
  5. Step 5: Solve for x
    x = 5,467,140,399.10/80,665.69
  6. Step 6: Final answer
    x = 67,775.29

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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.